Home / 1,278,165.40-1,917,248.10-646,997.20

Finding the Fourth Proportional to 1,278,165.40, 1,917,248.10 and 646,997.20

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Solution

The fourth proportional to 1,278,165.40, 1,917,248.10 and 646,997.20 is: 970,495.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,165.40 : 1,917,248.10 = 646,997.20 : x
  2. Step 2: Convert to fraction form
    1,278,165.40/1,917,248.10 = 646,997.20/x
  3. Step 3: Cross multiply
    1,278,165.40x = 1,917,248.10 × 646,997.20
  4. Step 4: Simplify right side
    1,278,165.40x = 1,240,454,152,405.32
  5. Step 5: Solve for x
    x = 1,240,454,152,405.32/1,278,165.40
  6. Step 6: Final answer
    x = 970,495.80

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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.