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Finding the Fourth Proportional to 492.33, 739.10 and 318.44

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Solution

The fourth proportional to 492.33, 739.10 and 318.44 is: 478.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.33 : 739.10 = 318.44 : x
  2. Step 2: Convert to fraction form
    492.33/739.10 = 318.44/x
  3. Step 3: Cross multiply
    492.33x = 739.10 × 318.44
  4. Step 4: Simplify right side
    492.33x = 235,353.72
  5. Step 5: Solve for x
    x = 235,353.72/492.33
  6. Step 6: Final answer
    x = 478.04

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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.