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Finding the Fourth Proportional to 185.20, 278.10 and 144.49

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Solution

The fourth proportional to 185.20, 278.10 and 144.49 is: 216.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.20 : 278.10 = 144.49 : x
  2. Step 2: Convert to fraction form
    185.20/278.10 = 144.49/x
  3. Step 3: Cross multiply
    185.20x = 278.10 × 144.49
  4. Step 4: Simplify right side
    185.20x = 40,182.67
  5. Step 5: Solve for x
    x = 40,182.67/185.20
  6. Step 6: Final answer
    x = 216.97

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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.