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Finding the Fourth Proportional to 438,387.60, 657,127.80 and 238,285.20

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Solution

The fourth proportional to 438,387.60, 657,127.80 and 238,285.20 is: 357,181.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,387.60 : 657,127.80 = 238,285.20 : x
  2. Step 2: Convert to fraction form
    438,387.60/657,127.80 = 238,285.20/x
  3. Step 3: Cross multiply
    438,387.60x = 657,127.80 × 238,285.20
  4. Step 4: Simplify right side
    438,387.60x = 156,583,829,248.56
  5. Step 5: Solve for x
    x = 156,583,829,248.56/438,387.60
  6. Step 6: Final answer
    x = 357,181.25

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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.