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Finding the Fourth Proportional to 728.09, 1,092.22 and 317.27

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Solution

The fourth proportional to 728.09, 1,092.22 and 317.27 is: 475.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.09 : 1,092.22 = 317.27 : x
  2. Step 2: Convert to fraction form
    728.09/1,092.22 = 317.27/x
  3. Step 3: Cross multiply
    728.09x = 1,092.22 × 317.27
  4. Step 4: Simplify right side
    728.09x = 346,530.58
  5. Step 5: Solve for x
    x = 346,530.58/728.09
  6. Step 6: Final answer
    x = 475.94

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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.