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Finding the Fourth Proportional to 521.01, 781.38 and 247.05

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Solution

The fourth proportional to 521.01, 781.38 and 247.05 is: 370.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.01 : 781.38 = 247.05 : x
  2. Step 2: Convert to fraction form
    521.01/781.38 = 247.05/x
  3. Step 3: Cross multiply
    521.01x = 781.38 × 247.05
  4. Step 4: Simplify right side
    521.01x = 193,039.93
  5. Step 5: Solve for x
    x = 193,039.93/521.01
  6. Step 6: Final answer
    x = 370.51

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Double scale
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Similar ratio
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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.