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Finding the Fourth Proportional to 649.55, 974.82 and 239.08

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Solution

The fourth proportional to 649.55, 974.82 and 239.08 is: 358.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.55 : 974.82 = 239.08 : x
  2. Step 2: Convert to fraction form
    649.55/974.82 = 239.08/x
  3. Step 3: Cross multiply
    649.55x = 974.82 × 239.08
  4. Step 4: Simplify right side
    649.55x = 233,059.97
  5. Step 5: Solve for x
    x = 233,059.97/649.55
  6. Step 6: Final answer
    x = 358.80

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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.