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Finding the Fourth Proportional to 720.38, 1,080.59 and 233.43

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Solution

The fourth proportional to 720.38, 1,080.59 and 233.43 is: 350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.38 : 1,080.59 = 233.43 : x
  2. Step 2: Convert to fraction form
    720.38/1,080.59 = 233.43/x
  3. Step 3: Cross multiply
    720.38x = 1,080.59 × 233.43
  4. Step 4: Simplify right side
    720.38x = 252,240.96
  5. Step 5: Solve for x
    x = 252,240.96/720.38
  6. Step 6: Final answer
    x = 350.15

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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.