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Finding the Fourth Proportional to 492.31, 679.38 and 271.25

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Solution

The fourth proportional to 492.31, 679.38 and 271.25 is: 374.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.31 : 679.38 = 271.25 : x
  2. Step 2: Convert to fraction form
    492.31/679.38 = 271.25/x
  3. Step 3: Cross multiply
    492.31x = 679.38 × 271.25
  4. Step 4: Simplify right side
    492.31x = 184,282.85
  5. Step 5: Solve for x
    x = 184,282.85/492.31
  6. Step 6: Final answer
    x = 374.33

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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.