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Finding the Fourth Proportional to 881.46, 1,215.81 and 531.54

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Solution

The fourth proportional to 881.46, 1,215.81 and 531.54 is: 733.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.46 : 1,215.81 = 531.54 : x
  2. Step 2: Convert to fraction form
    881.46/1,215.81 = 531.54/x
  3. Step 3: Cross multiply
    881.46x = 1,215.81 × 531.54
  4. Step 4: Simplify right side
    881.46x = 646,251.65
  5. Step 5: Solve for x
    x = 646,251.65/881.46
  6. Step 6: Final answer
    x = 733.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.