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Finding the Fourth Proportional to 891.89, 1,337.27 and 343.41

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Solution

The fourth proportional to 891.89, 1,337.27 and 343.41 is: 514.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.89 : 1,337.27 = 343.41 : x
  2. Step 2: Convert to fraction form
    891.89/1,337.27 = 343.41/x
  3. Step 3: Cross multiply
    891.89x = 1,337.27 × 343.41
  4. Step 4: Simplify right side
    891.89x = 459,230.17
  5. Step 5: Solve for x
    x = 459,230.17/891.89
  6. Step 6: Final answer
    x = 514.90

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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.