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Finding the Fourth Proportional to 279.13, 385.35 and 168.63

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Solution

The fourth proportional to 279.13, 385.35 and 168.63 is: 232.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.13 : 385.35 = 168.63 : x
  2. Step 2: Convert to fraction form
    279.13/385.35 = 168.63/x
  3. Step 3: Cross multiply
    279.13x = 385.35 × 168.63
  4. Step 4: Simplify right side
    279.13x = 64,981.57
  5. Step 5: Solve for x
    x = 64,981.57/279.13
  6. Step 6: Final answer
    x = 232.80

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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.