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Finding the Fourth Proportional to 528,862.40, 792,127.20 and 318,132.80

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Solution

The fourth proportional to 528,862.40, 792,127.20 and 318,132.80 is: 476,497.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,862.40 : 792,127.20 = 318,132.80 : x
  2. Step 2: Convert to fraction form
    528,862.40/792,127.20 = 318,132.80/x
  3. Step 3: Cross multiply
    528,862.40x = 792,127.20 × 318,132.80
  4. Step 4: Simplify right side
    528,862.40x = 252,001,644,092.16
  5. Step 5: Solve for x
    x = 252,001,644,092.16/528,862.40
  6. Step 6: Final answer
    x = 476,497.56

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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.