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Finding the Fourth Proportional to 649.91, 974.81 and 265.15

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Solution

The fourth proportional to 649.91, 974.81 and 265.15 is: 397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.91 : 974.81 = 265.15 : x
  2. Step 2: Convert to fraction form
    649.91/974.81 = 265.15/x
  3. Step 3: Cross multiply
    649.91x = 974.81 × 265.15
  4. Step 4: Simplify right side
    649.91x = 258,470.87
  5. Step 5: Solve for x
    x = 258,470.87/649.91
  6. Step 6: Final answer
    x = 397.70

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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.