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Finding the Fourth Proportional to 2,211.91, 3,317 and 731.07

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Solution

The fourth proportional to 2,211.91, 3,317 and 731.07 is: 1,096.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.91 : 3,317 = 731.07 : x
  2. Step 2: Convert to fraction form
    2,211.91/3,317 = 731.07/x
  3. Step 3: Cross multiply
    2,211.91x = 3,317 × 731.07
  4. Step 4: Simplify right side
    2,211.91x = 2,424,959.19
  5. Step 5: Solve for x
    x = 2,424,959.19/2,211.91
  6. Step 6: Final answer
    x = 1,096.32

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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.