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Finding the Fourth Proportional to 261,645.60, 392,472 and 74,657.04

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Solution

The fourth proportional to 261,645.60, 392,472 and 74,657.04 is: 111,986.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,645.60 : 392,472 = 74,657.04 : x
  2. Step 2: Convert to fraction form
    261,645.60/392,472 = 74,657.04/x
  3. Step 3: Cross multiply
    261,645.60x = 392,472 × 74,657.04
  4. Step 4: Simplify right side
    261,645.60x = 29,300,797,802.88
  5. Step 5: Solve for x
    x = 29,300,797,802.88/261,645.60
  6. Step 6: Final answer
    x = 111,986.59

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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.