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Finding the Fourth Proportional to 2,218.40, 3,326.92 and 756.72

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Solution

The fourth proportional to 2,218.40, 3,326.92 and 756.72 is: 1,134.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.40 : 3,326.92 = 756.72 : x
  2. Step 2: Convert to fraction form
    2,218.40/3,326.92 = 756.72/x
  3. Step 3: Cross multiply
    2,218.40x = 3,326.92 × 756.72
  4. Step 4: Simplify right side
    2,218.40x = 2,517,546.90
  5. Step 5: Solve for x
    x = 2,517,546.90/2,218.40
  6. Step 6: Final answer
    x = 1,134.85

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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.