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Finding the Fourth Proportional to 882.68, 1,215.32 and 749.64

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Solution

The fourth proportional to 882.68, 1,215.32 and 749.64 is: 1,032.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.68 : 1,215.32 = 749.64 : x
  2. Step 2: Convert to fraction form
    882.68/1,215.32 = 749.64/x
  3. Step 3: Cross multiply
    882.68x = 1,215.32 × 749.64
  4. Step 4: Simplify right side
    882.68x = 911,042.66
  5. Step 5: Solve for x
    x = 911,042.66/882.68
  6. Step 6: Final answer
    x = 1,032.13

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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.