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Finding the Fourth Proportional to 644.57, 966.75 and 254.35

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Solution

The fourth proportional to 644.57, 966.75 and 254.35 is: 381.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.57 : 966.75 = 254.35 : x
  2. Step 2: Convert to fraction form
    644.57/966.75 = 254.35/x
  3. Step 3: Cross multiply
    644.57x = 966.75 × 254.35
  4. Step 4: Simplify right side
    644.57x = 245,892.86
  5. Step 5: Solve for x
    x = 245,892.86/644.57
  6. Step 6: Final answer
    x = 381.48

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Double scale
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Similar ratio
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1.5x scale

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.