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Finding the Fourth Proportional to 2,217.72, 3,325.65 and 756.96

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Solution

The fourth proportional to 2,217.72, 3,325.65 and 756.96 is: 1,135.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.72 : 3,325.65 = 756.96 : x
  2. Step 2: Convert to fraction form
    2,217.72/3,325.65 = 756.96/x
  3. Step 3: Cross multiply
    2,217.72x = 3,325.65 × 756.96
  4. Step 4: Simplify right side
    2,217.72x = 2,517,384.02
  5. Step 5: Solve for x
    x = 2,517,384.02/2,217.72
  6. Step 6: Final answer
    x = 1,135.12

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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.