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Finding the Fourth Proportional to 279.67, 385.98 and 169.15

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Solution

The fourth proportional to 279.67, 385.98 and 169.15 is: 233.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.67 : 385.98 = 169.15 : x
  2. Step 2: Convert to fraction form
    279.67/385.98 = 169.15/x
  3. Step 3: Cross multiply
    279.67x = 385.98 × 169.15
  4. Step 4: Simplify right side
    279.67x = 65,288.52
  5. Step 5: Solve for x
    x = 65,288.52/279.67
  6. Step 6: Final answer
    x = 233.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.