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Finding the Fourth Proportional to 492.62, 679.78 and 271.57

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Solution

The fourth proportional to 492.62, 679.78 and 271.57 is: 374.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.62 : 679.78 = 271.57 : x
  2. Step 2: Convert to fraction form
    492.62/679.78 = 271.57/x
  3. Step 3: Cross multiply
    492.62x = 679.78 × 271.57
  4. Step 4: Simplify right side
    492.62x = 184,607.85
  5. Step 5: Solve for x
    x = 184,607.85/492.62
  6. Step 6: Final answer
    x = 374.75

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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.