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Finding the Fourth Proportional to 521,446.80, 782,753.40 and 403,640.40

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Solution

The fourth proportional to 521,446.80, 782,753.40 and 403,640.40 is: 605,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,446.80 : 782,753.40 = 403,640.40 : x
  2. Step 2: Convert to fraction form
    521,446.80/782,753.40 = 403,640.40/x
  3. Step 3: Cross multiply
    521,446.80x = 782,753.40 × 403,640.40
  4. Step 4: Simplify right side
    521,446.80x = 315,950,895,477.36
  5. Step 5: Solve for x
    x = 315,950,895,477.36/521,446.80
  6. Step 6: Final answer
    x = 605,912.04

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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.