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Finding the Fourth Proportional to 650.39, 974.85 and 239.18

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Solution

The fourth proportional to 650.39, 974.85 and 239.18 is: 358.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.39 : 974.85 = 239.18 : x
  2. Step 2: Convert to fraction form
    650.39/974.85 = 239.18/x
  3. Step 3: Cross multiply
    650.39x = 974.85 × 239.18
  4. Step 4: Simplify right side
    650.39x = 233,159.75
  5. Step 5: Solve for x
    x = 233,159.75/650.39
  6. Step 6: Final answer
    x = 358.49

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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.