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Finding the Fourth Proportional to 528,651.92, 728,534.04 and 518,936.24

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Solution

The fourth proportional to 528,651.92, 728,534.04 and 518,936.24 is: 715,144.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,651.92 : 728,534.04 = 518,936.24 : x
  2. Step 2: Convert to fraction form
    528,651.92/728,534.04 = 518,936.24/x
  3. Step 3: Cross multiply
    528,651.92x = 728,534.04 × 518,936.24
  4. Step 4: Simplify right side
    528,651.92x = 378,062,715,429.61
  5. Step 5: Solve for x
    x = 378,062,715,429.61/528,651.92
  6. Step 6: Final answer
    x = 715,144.88

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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.