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Finding the Fourth Proportional to 261,810.56, 392,730.24 and 84,304.64

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Solution

The fourth proportional to 261,810.56, 392,730.24 and 84,304.64 is: 126,461.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,810.56 : 392,730.24 = 84,304.64 : x
  2. Step 2: Convert to fraction form
    261,810.56/392,730.24 = 84,304.64/x
  3. Step 3: Cross multiply
    261,810.56x = 392,730.24 × 84,304.64
  4. Step 4: Simplify right side
    261,810.56x = 33,108,981,500.31
  5. Step 5: Solve for x
    x = 33,108,981,500.31/261,810.56
  6. Step 6: Final answer
    x = 126,461.60

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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.