Home / 1,278,165,867.80-1,917,248,801.70-658,293,085.40

Finding the Fourth Proportional to 1,278,165,867.80, 1,917,248,801.70 and 658,293,085.40

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Solution

The fourth proportional to 1,278,165,867.80, 1,917,248,801.70 and 658,293,085.40 is: 987,439,628.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,165,867.80 : 1,917,248,801.70 = 658,293,085.40 : x
  2. Step 2: Convert to fraction form
    1,278,165,867.80/1,917,248,801.70 = 658,293,085.40/x
  3. Step 3: Cross multiply
    1,278,165,867.80x = 1,917,248,801.70 × 658,293,085.40
  4. Step 4: Simplify right side
    1,278,165,867.80x = 1,262,111,629,150,545,664
  5. Step 5: Solve for x
    x = 1,262,111,629,150,545,664/1,278,165,867.80
  6. Step 6: Final answer
    x = 987,439,628.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.