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Finding the Fourth Proportional to 261,591, 392,390.19 and 74,602.50

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Solution

The fourth proportional to 261,591, 392,390.19 and 74,602.50 is: 111,904.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,591 : 392,390.19 = 74,602.50 : x
  2. Step 2: Convert to fraction form
    261,591/392,390.19 = 74,602.50/x
  3. Step 3: Cross multiply
    261,591x = 392,390.19 × 74,602.50
  4. Step 4: Simplify right side
    261,591x = 29,273,289,149.48
  5. Step 5: Solve for x
    x = 29,273,289,149.48/261,591
  6. Step 6: Final answer
    x = 111,904.80

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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.