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Finding the Fourth Proportional to 342.27, 471.69 and 279.90

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Solution

The fourth proportional to 342.27, 471.69 and 279.90 is: 385.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.27 : 471.69 = 279.90 : x
  2. Step 2: Convert to fraction form
    342.27/471.69 = 279.90/x
  3. Step 3: Cross multiply
    342.27x = 471.69 × 279.90
  4. Step 4: Simplify right side
    342.27x = 132,026.03
  5. Step 5: Solve for x
    x = 132,026.03/342.27
  6. Step 6: Final answer
    x = 385.74

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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.