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Finding the Fourth Proportional to 805.27, 1,208.09 and 372.46

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Solution

The fourth proportional to 805.27, 1,208.09 and 372.46 is: 558.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.27 : 1,208.09 = 372.46 : x
  2. Step 2: Convert to fraction form
    805.27/1,208.09 = 372.46/x
  3. Step 3: Cross multiply
    805.27x = 1,208.09 × 372.46
  4. Step 4: Simplify right side
    805.27x = 449,965.20
  5. Step 5: Solve for x
    x = 449,965.20/805.27
  6. Step 6: Final answer
    x = 558.78

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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.