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Finding the Fourth Proportional to 711.81, 981.97 and 463.04

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Solution

The fourth proportional to 711.81, 981.97 and 463.04 is: 638.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.81 : 981.97 = 463.04 : x
  2. Step 2: Convert to fraction form
    711.81/981.97 = 463.04/x
  3. Step 3: Cross multiply
    711.81x = 981.97 × 463.04
  4. Step 4: Simplify right side
    711.81x = 454,691.44
  5. Step 5: Solve for x
    x = 454,691.44/711.81
  6. Step 6: Final answer
    x = 638.78

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.