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Finding the Fourth Proportional to 2,217.57, 3,326.35 and 756.60

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Solution

The fourth proportional to 2,217.57, 3,326.35 and 756.60 is: 1,134.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.57 : 3,326.35 = 756.60 : x
  2. Step 2: Convert to fraction form
    2,217.57/3,326.35 = 756.60/x
  3. Step 3: Cross multiply
    2,217.57x = 3,326.35 × 756.60
  4. Step 4: Simplify right side
    2,217.57x = 2,516,716.41
  5. Step 5: Solve for x
    x = 2,516,716.41/2,217.57
  6. Step 6: Final answer
    x = 1,134.90

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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.