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Finding the Fourth Proportional to 492.88, 739.12 and 146.16

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Solution

The fourth proportional to 492.88, 739.12 and 146.16 is: 219.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.88 : 739.12 = 146.16 : x
  2. Step 2: Convert to fraction form
    492.88/739.12 = 146.16/x
  3. Step 3: Cross multiply
    492.88x = 739.12 × 146.16
  4. Step 4: Simplify right side
    492.88x = 108,029.78
  5. Step 5: Solve for x
    x = 108,029.78/492.88
  6. Step 6: Final answer
    x = 219.18

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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.