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Finding the Fourth Proportional to 649.65, 974.34 and 187.44

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Solution

The fourth proportional to 649.65, 974.34 and 187.44 is: 281.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.65 : 974.34 = 187.44 : x
  2. Step 2: Convert to fraction form
    649.65/974.34 = 187.44/x
  3. Step 3: Cross multiply
    649.65x = 974.34 × 187.44
  4. Step 4: Simplify right side
    649.65x = 182,630.29
  5. Step 5: Solve for x
    x = 182,630.29/649.65
  6. Step 6: Final answer
    x = 281.12

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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.