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Finding the Fourth Proportional to 492.12, 738.22 and 126.91

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Solution

The fourth proportional to 492.12, 738.22 and 126.91 is: 190.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.12 : 738.22 = 126.91 : x
  2. Step 2: Convert to fraction form
    492.12/738.22 = 126.91/x
  3. Step 3: Cross multiply
    492.12x = 738.22 × 126.91
  4. Step 4: Simplify right side
    492.12x = 93,686.87
  5. Step 5: Solve for x
    x = 93,686.87/492.12
  6. Step 6: Final answer
    x = 190.37

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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.