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Finding the Fourth Proportional to 885, 1,221.32 and 575.04

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Solution

The fourth proportional to 885, 1,221.32 and 575.04 is: 793.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    885 : 1,221.32 = 575.04 : x
  2. Step 2: Convert to fraction form
    885/1,221.32 = 575.04/x
  3. Step 3: Cross multiply
    885x = 1,221.32 × 575.04
  4. Step 4: Simplify right side
    885x = 702,304.98
  5. Step 5: Solve for x
    x = 702,304.98/885
  6. Step 6: Final answer
    x = 793.56

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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.