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Finding the Fourth Proportional to 720.87, 1,081.37 and 233.97

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Solution

The fourth proportional to 720.87, 1,081.37 and 233.97 is: 350.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.87 : 1,081.37 = 233.97 : x
  2. Step 2: Convert to fraction form
    720.87/1,081.37 = 233.97/x
  3. Step 3: Cross multiply
    720.87x = 1,081.37 × 233.97
  4. Step 4: Simplify right side
    720.87x = 253,001.56
  5. Step 5: Solve for x
    x = 253,001.56/720.87
  6. Step 6: Final answer
    x = 350.97

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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.