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Finding the Fourth Proportional to 492.20, 738.40 and 232.20

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Solution

The fourth proportional to 492.20, 738.40 and 232.20 is: 348.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.20 : 738.40 = 232.20 : x
  2. Step 2: Convert to fraction form
    492.20/738.40 = 232.20/x
  3. Step 3: Cross multiply
    492.20x = 738.40 × 232.20
  4. Step 4: Simplify right side
    492.20x = 171,456.48
  5. Step 5: Solve for x
    x = 171,456.48/492.20
  6. Step 6: Final answer
    x = 348.35

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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.