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Finding the Fourth Proportional to 2,215.12, 3,322.56 and 676

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Solution

The fourth proportional to 2,215.12, 3,322.56 and 676 is: 1,013.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.12 : 3,322.56 = 676 : x
  2. Step 2: Convert to fraction form
    2,215.12/3,322.56 = 676/x
  3. Step 3: Cross multiply
    2,215.12x = 3,322.56 × 676
  4. Step 4: Simplify right side
    2,215.12x = 2,246,050.56
  5. Step 5: Solve for x
    x = 2,246,050.56/2,215.12
  6. Step 6: Final answer
    x = 1,013.96

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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.