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Finding the Fourth Proportional to 378,487.20, 567,718.50 and 153,781.20

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Solution

The fourth proportional to 378,487.20, 567,718.50 and 153,781.20 is: 230,666.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,487.20 : 567,718.50 = 153,781.20 : x
  2. Step 2: Convert to fraction form
    378,487.20/567,718.50 = 153,781.20/x
  3. Step 3: Cross multiply
    378,487.20x = 567,718.50 × 153,781.20
  4. Step 4: Simplify right side
    378,487.20x = 87,304,432,192.20
  5. Step 5: Solve for x
    x = 87,304,432,192.20/378,487.20
  6. Step 6: Final answer
    x = 230,666.80

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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.