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Finding the Fourth Proportional to 615.11, 921.91 and 249.70

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Solution

The fourth proportional to 615.11, 921.91 and 249.70 is: 374.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.11 : 921.91 = 249.70 : x
  2. Step 2: Convert to fraction form
    615.11/921.91 = 249.70/x
  3. Step 3: Cross multiply
    615.11x = 921.91 × 249.70
  4. Step 4: Simplify right side
    615.11x = 230,200.93
  5. Step 5: Solve for x
    x = 230,200.93/615.11
  6. Step 6: Final answer
    x = 374.24

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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.