Home / 742,989.30-1,025,337.15-420,690.78

Finding the Fourth Proportional to 742,989.30, 1,025,337.15 and 420,690.78

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Solution

The fourth proportional to 742,989.30, 1,025,337.15 and 420,690.78 is: 580,560.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,989.30 : 1,025,337.15 = 420,690.78 : x
  2. Step 2: Convert to fraction form
    742,989.30/1,025,337.15 = 420,690.78/x
  3. Step 3: Cross multiply
    742,989.30x = 1,025,337.15 × 420,690.78
  4. Step 4: Simplify right side
    742,989.30x = 431,349,885,396.48
  5. Step 5: Solve for x
    x = 431,349,885,396.48/742,989.30
  6. Step 6: Final answer
    x = 580,560.02

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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.