Home / 1,278,153.40-1,917,230.10-646,985.20

Finding the Fourth Proportional to 1,278,153.40, 1,917,230.10 and 646,985.20

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Solution

The fourth proportional to 1,278,153.40, 1,917,230.10 and 646,985.20 is: 970,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,153.40 : 1,917,230.10 = 646,985.20 : x
  2. Step 2: Convert to fraction form
    1,278,153.40/1,917,230.10 = 646,985.20/x
  3. Step 3: Cross multiply
    1,278,153.40x = 1,917,230.10 × 646,985.20
  4. Step 4: Simplify right side
    1,278,153.40x = 1,240,419,499,694.52
  5. Step 5: Solve for x
    x = 1,240,419,499,694.52/1,278,153.40
  6. Step 6: Final answer
    x = 970,477.80

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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.