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Finding the Fourth Proportional to 805.52, 1,207.56 and 669.44

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Solution

The fourth proportional to 805.52, 1,207.56 and 669.44 is: 1,003.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.52 : 1,207.56 = 669.44 : x
  2. Step 2: Convert to fraction form
    805.52/1,207.56 = 669.44/x
  3. Step 3: Cross multiply
    805.52x = 1,207.56 × 669.44
  4. Step 4: Simplify right side
    805.52x = 808,388.97
  5. Step 5: Solve for x
    x = 808,388.97/805.52
  6. Step 6: Final answer
    x = 1,003.56

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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.