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Finding the Fourth Proportional to 649.62, 974.28 and 238.53

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Solution

The fourth proportional to 649.62, 974.28 and 238.53 is: 357.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.62 : 974.28 = 238.53 : x
  2. Step 2: Convert to fraction form
    649.62/974.28 = 238.53/x
  3. Step 3: Cross multiply
    649.62x = 974.28 × 238.53
  4. Step 4: Simplify right side
    649.62x = 232,395.01
  5. Step 5: Solve for x
    x = 232,395.01/649.62
  6. Step 6: Final answer
    x = 357.74

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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.