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Finding the Fourth Proportional to 720.57, 1,080.56 and 226.81

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Solution

The fourth proportional to 720.57, 1,080.56 and 226.81 is: 340.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.57 : 1,080.56 = 226.81 : x
  2. Step 2: Convert to fraction form
    720.57/1,080.56 = 226.81/x
  3. Step 3: Cross multiply
    720.57x = 1,080.56 × 226.81
  4. Step 4: Simplify right side
    720.57x = 245,086.13
  5. Step 5: Solve for x
    x = 245,086.13/720.57
  6. Step 6: Final answer
    x = 340.13

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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.