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Finding the Fourth Proportional to 638.59, 958.12 and 330.25

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Solution

The fourth proportional to 638.59, 958.12 and 330.25 is: 495.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.59 : 958.12 = 330.25 : x
  2. Step 2: Convert to fraction form
    638.59/958.12 = 330.25/x
  3. Step 3: Cross multiply
    638.59x = 958.12 × 330.25
  4. Step 4: Simplify right side
    638.59x = 316,414.34
  5. Step 5: Solve for x
    x = 316,414.34/638.59
  6. Step 6: Final answer
    x = 495.49

Related Problems

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Half scale
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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.