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Finding the Fourth Proportional to 492.38, 679.49 and 271.32

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Solution

The fourth proportional to 492.38, 679.49 and 271.32 is: 374.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.38 : 679.49 = 271.32 : x
  2. Step 2: Convert to fraction form
    492.38/679.49 = 271.32/x
  3. Step 3: Cross multiply
    492.38x = 679.49 × 271.32
  4. Step 4: Simplify right side
    492.38x = 184,359.23
  5. Step 5: Solve for x
    x = 184,359.23/492.38
  6. Step 6: Final answer
    x = 374.42

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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.