Home / 742,989.80-1,025,337.84-420,691.28

Finding the Fourth Proportional to 742,989.80, 1,025,337.84 and 420,691.28

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Solution

The fourth proportional to 742,989.80, 1,025,337.84 and 420,691.28 is: 580,560.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,989.80 : 1,025,337.84 = 420,691.28 : x
  2. Step 2: Convert to fraction form
    742,989.80/1,025,337.84 = 420,691.28/x
  3. Step 3: Cross multiply
    742,989.80x = 1,025,337.84 × 420,691.28
  4. Step 4: Simplify right side
    742,989.80x = 431,350,688,342.04
  5. Step 5: Solve for x
    x = 431,350,688,342.04/742,989.80
  6. Step 6: Final answer
    x = 580,560.71

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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.