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Finding the Fourth Proportional to 649.67, 974.50 and 392.63

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Solution

The fourth proportional to 649.67, 974.50 and 392.63 is: 588.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.67 : 974.50 = 392.63 : x
  2. Step 2: Convert to fraction form
    649.67/974.50 = 392.63/x
  3. Step 3: Cross multiply
    649.67x = 974.50 × 392.63
  4. Step 4: Simplify right side
    649.67x = 382,612.08
  5. Step 5: Solve for x
    x = 382,612.08/649.67
  6. Step 6: Final answer
    x = 588.94

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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.