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Finding the Fourth Proportional to 881.36, 1,215.72 and 531.96

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Solution

The fourth proportional to 881.36, 1,215.72 and 531.96 is: 733.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.36 : 1,215.72 = 531.96 : x
  2. Step 2: Convert to fraction form
    881.36/1,215.72 = 531.96/x
  3. Step 3: Cross multiply
    881.36x = 1,215.72 × 531.96
  4. Step 4: Simplify right side
    881.36x = 646,714.41
  5. Step 5: Solve for x
    x = 646,714.41/881.36
  6. Step 6: Final answer
    x = 733.77

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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.