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Finding the Fourth Proportional to 521.20, 781.76 and 151.04

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Solution

The fourth proportional to 521.20, 781.76 and 151.04 is: 226.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.20 : 781.76 = 151.04 : x
  2. Step 2: Convert to fraction form
    521.20/781.76 = 151.04/x
  3. Step 3: Cross multiply
    521.20x = 781.76 × 151.04
  4. Step 4: Simplify right side
    521.20x = 118,077.03
  5. Step 5: Solve for x
    x = 118,077.03/521.20
  6. Step 6: Final answer
    x = 226.55

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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.