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Finding the Fourth Proportional to 279.75, 385.71 and 169.18

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Solution

The fourth proportional to 279.75, 385.71 and 169.18 is: 233.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.75 : 385.71 = 169.18 : x
  2. Step 2: Convert to fraction form
    279.75/385.71 = 169.18/x
  3. Step 3: Cross multiply
    279.75x = 385.71 × 169.18
  4. Step 4: Simplify right side
    279.75x = 65,254.42
  5. Step 5: Solve for x
    x = 65,254.42/279.75
  6. Step 6: Final answer
    x = 233.26

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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.