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Finding the Fourth Proportional to 739.12, 1,110.12 and 721.84

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Solution

The fourth proportional to 739.12, 1,110.12 and 721.84 is: 1,084.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.12 : 1,110.12 = 721.84 : x
  2. Step 2: Convert to fraction form
    739.12/1,110.12 = 721.84/x
  3. Step 3: Cross multiply
    739.12x = 1,110.12 × 721.84
  4. Step 4: Simplify right side
    739.12x = 801,329.02
  5. Step 5: Solve for x
    x = 801,329.02/739.12
  6. Step 6: Final answer
    x = 1,084.17

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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.