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Finding the Fourth Proportional to 805.82, 1,208.72 and 496.73

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Solution

The fourth proportional to 805.82, 1,208.72 and 496.73 is: 745.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.82 : 1,208.72 = 496.73 : x
  2. Step 2: Convert to fraction form
    805.82/1,208.72 = 496.73/x
  3. Step 3: Cross multiply
    805.82x = 1,208.72 × 496.73
  4. Step 4: Simplify right side
    805.82x = 600,398.96
  5. Step 5: Solve for x
    x = 600,398.96/805.82
  6. Step 6: Final answer
    x = 745.08

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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.