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Finding the Fourth Proportional to 891.57, 1,337.41 and 343.68

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Solution

The fourth proportional to 891.57, 1,337.41 and 343.68 is: 515.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.57 : 1,337.41 = 343.68 : x
  2. Step 2: Convert to fraction form
    891.57/1,337.41 = 343.68/x
  3. Step 3: Cross multiply
    891.57x = 1,337.41 × 343.68
  4. Step 4: Simplify right side
    891.57x = 459,636.48
  5. Step 5: Solve for x
    x = 459,636.48/891.57
  6. Step 6: Final answer
    x = 515.53

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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.