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Finding the Fourth Proportional to 2,212.64, 3,318.96 and 752.84

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Solution

The fourth proportional to 2,212.64, 3,318.96 and 752.84 is: 1,129.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.64 : 3,318.96 = 752.84 : x
  2. Step 2: Convert to fraction form
    2,212.64/3,318.96 = 752.84/x
  3. Step 3: Cross multiply
    2,212.64x = 3,318.96 × 752.84
  4. Step 4: Simplify right side
    2,212.64x = 2,498,645.85
  5. Step 5: Solve for x
    x = 2,498,645.85/2,212.64
  6. Step 6: Final answer
    x = 1,129.26

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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.