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Finding the Fourth Proportional to 261,657, 392,489.28 and 74,668.50

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Solution

The fourth proportional to 261,657, 392,489.28 and 74,668.50 is: 112,003.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,657 : 392,489.28 = 74,668.50 : x
  2. Step 2: Convert to fraction form
    261,657/392,489.28 = 74,668.50/x
  3. Step 3: Cross multiply
    261,657x = 392,489.28 × 74,668.50
  4. Step 4: Simplify right side
    261,657x = 29,306,585,803.68
  5. Step 5: Solve for x
    x = 29,306,585,803.68/261,657
  6. Step 6: Final answer
    x = 112,003.83

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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.