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Finding the Fourth Proportional to 739.92, 1,109.98 and 301.28

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Solution

The fourth proportional to 739.92, 1,109.98 and 301.28 is: 451.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.92 : 1,109.98 = 301.28 : x
  2. Step 2: Convert to fraction form
    739.92/1,109.98 = 301.28/x
  3. Step 3: Cross multiply
    739.92x = 1,109.98 × 301.28
  4. Step 4: Simplify right side
    739.92x = 334,414.77
  5. Step 5: Solve for x
    x = 334,414.77/739.92
  6. Step 6: Final answer
    x = 451.96

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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.