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Finding the Fourth Proportional to 871.52, 1,305.48 and 698.48

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Solution

The fourth proportional to 871.52, 1,305.48 and 698.48 is: 1,046.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.52 : 1,305.48 = 698.48 : x
  2. Step 2: Convert to fraction form
    871.52/1,305.48 = 698.48/x
  3. Step 3: Cross multiply
    871.52x = 1,305.48 × 698.48
  4. Step 4: Simplify right side
    871.52x = 911,851.67
  5. Step 5: Solve for x
    x = 911,851.67/871.52
  6. Step 6: Final answer
    x = 1,046.28

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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.