Home / 905,998.90-1,250,279.28-498,107.68

Finding the Fourth Proportional to 905,998.90, 1,250,279.28 and 498,107.68

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Solution

The fourth proportional to 905,998.90, 1,250,279.28 and 498,107.68 is: 687,389.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,998.90 : 1,250,279.28 = 498,107.68 : x
  2. Step 2: Convert to fraction form
    905,998.90/1,250,279.28 = 498,107.68/x
  3. Step 3: Cross multiply
    905,998.90x = 1,250,279.28 × 498,107.68
  4. Step 4: Simplify right side
    905,998.90x = 622,773,708,387.17
  5. Step 5: Solve for x
    x = 622,773,708,387.17/905,998.90
  6. Step 6: Final answer
    x = 687,389.04

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.