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Finding the Fourth Proportional to 521.74, 781.56 and 301.73

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Solution

The fourth proportional to 521.74, 781.56 and 301.73 is: 451.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.74 : 781.56 = 301.73 : x
  2. Step 2: Convert to fraction form
    521.74/781.56 = 301.73/x
  3. Step 3: Cross multiply
    521.74x = 781.56 × 301.73
  4. Step 4: Simplify right side
    521.74x = 235,820.10
  5. Step 5: Solve for x
    x = 235,820.10/521.74
  6. Step 6: Final answer
    x = 451.99

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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.