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Finding the Fourth Proportional to 492.70, 739.50 and 249.39

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Solution

The fourth proportional to 492.70, 739.50 and 249.39 is: 374.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.70 : 739.50 = 249.39 : x
  2. Step 2: Convert to fraction form
    492.70/739.50 = 249.39/x
  3. Step 3: Cross multiply
    492.70x = 739.50 × 249.39
  4. Step 4: Simplify right side
    492.70x = 184,423.91
  5. Step 5: Solve for x
    x = 184,423.91/492.70
  6. Step 6: Final answer
    x = 374.32

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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.