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Finding the Fourth Proportional to 563.31, 844.20 and 254.78

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Solution

The fourth proportional to 563.31, 844.20 and 254.78 is: 381.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.31 : 844.20 = 254.78 : x
  2. Step 2: Convert to fraction form
    563.31/844.20 = 254.78/x
  3. Step 3: Cross multiply
    563.31x = 844.20 × 254.78
  4. Step 4: Simplify right side
    563.31x = 215,085.28
  5. Step 5: Solve for x
    x = 215,085.28/563.31
  6. Step 6: Final answer
    x = 381.82

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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.