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Finding the Fourth Proportional to 798.27, 1,197.17 and 311.21

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Solution

The fourth proportional to 798.27, 1,197.17 and 311.21 is: 466.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.27 : 1,197.17 = 311.21 : x
  2. Step 2: Convert to fraction form
    798.27/1,197.17 = 311.21/x
  3. Step 3: Cross multiply
    798.27x = 1,197.17 × 311.21
  4. Step 4: Simplify right side
    798.27x = 372,569.39
  5. Step 5: Solve for x
    x = 372,569.39/798.27
  6. Step 6: Final answer
    x = 466.72

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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.