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Finding the Fourth Proportional to 649.95, 974.98 and 239.09

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Solution

The fourth proportional to 649.95, 974.98 and 239.09 is: 358.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.95 : 974.98 = 239.09 : x
  2. Step 2: Convert to fraction form
    649.95/974.98 = 239.09/x
  3. Step 3: Cross multiply
    649.95x = 974.98 × 239.09
  4. Step 4: Simplify right side
    649.95x = 233,103.39
  5. Step 5: Solve for x
    x = 233,103.39/649.95
  6. Step 6: Final answer
    x = 358.65

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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.