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Finding the Fourth Proportional to 2,213.81, 3,320.31 and 732.57

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Solution

The fourth proportional to 2,213.81, 3,320.31 and 732.57 is: 1,098.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.81 : 3,320.31 = 732.57 : x
  2. Step 2: Convert to fraction form
    2,213.81/3,320.31 = 732.57/x
  3. Step 3: Cross multiply
    2,213.81x = 3,320.31 × 732.57
  4. Step 4: Simplify right side
    2,213.81x = 2,432,359.50
  5. Step 5: Solve for x
    x = 2,432,359.50/2,213.81
  6. Step 6: Final answer
    x = 1,098.72

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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.