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Finding the Fourth Proportional to 728.19, 1,091.41 and 337.66

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Solution

The fourth proportional to 728.19, 1,091.41 and 337.66 is: 506.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.19 : 1,091.41 = 337.66 : x
  2. Step 2: Convert to fraction form
    728.19/1,091.41 = 337.66/x
  3. Step 3: Cross multiply
    728.19x = 1,091.41 × 337.66
  4. Step 4: Simplify right side
    728.19x = 368,521.93
  5. Step 5: Solve for x
    x = 368,521.93/728.19
  6. Step 6: Final answer
    x = 506.08

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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.