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Finding the Fourth Proportional to 649.35, 974.09 and 238.39

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Solution

The fourth proportional to 649.35, 974.09 and 238.39 is: 357.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.35 : 974.09 = 238.39 : x
  2. Step 2: Convert to fraction form
    649.35/974.09 = 238.39/x
  3. Step 3: Cross multiply
    649.35x = 974.09 × 238.39
  4. Step 4: Simplify right side
    649.35x = 232,213.32
  5. Step 5: Solve for x
    x = 232,213.32/649.35
  6. Step 6: Final answer
    x = 357.61

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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.