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Finding the Fourth Proportional to 891.89, 1,337.19 and 343.97

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Solution

The fourth proportional to 891.89, 1,337.19 and 343.97 is: 515.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.89 : 1,337.19 = 343.97 : x
  2. Step 2: Convert to fraction form
    891.89/1,337.19 = 343.97/x
  3. Step 3: Cross multiply
    891.89x = 1,337.19 × 343.97
  4. Step 4: Simplify right side
    891.89x = 459,953.24
  5. Step 5: Solve for x
    x = 459,953.24/891.89
  6. Step 6: Final answer
    x = 515.71

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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.