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Finding the Fourth Proportional to 279.34, 418.57 and 149.33

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Solution

The fourth proportional to 279.34, 418.57 and 149.33 is: 223.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.34 : 418.57 = 149.33 : x
  2. Step 2: Convert to fraction form
    279.34/418.57 = 149.33/x
  3. Step 3: Cross multiply
    279.34x = 418.57 × 149.33
  4. Step 4: Simplify right side
    279.34x = 62,505.73
  5. Step 5: Solve for x
    x = 62,505.73/279.34
  6. Step 6: Final answer
    x = 223.76

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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.