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Finding the Fourth Proportional to 492.62, 738.92 and 127.40

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Solution

The fourth proportional to 492.62, 738.92 and 127.40 is: 191.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.62 : 738.92 = 127.40 : x
  2. Step 2: Convert to fraction form
    492.62/738.92 = 127.40/x
  3. Step 3: Cross multiply
    492.62x = 738.92 × 127.40
  4. Step 4: Simplify right side
    492.62x = 94,134.32
  5. Step 5: Solve for x
    x = 94,134.32/492.62
  6. Step 6: Final answer
    x = 191.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.