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Finding the Fourth Proportional to 891.54, 1,337.54 and 343.58

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Solution

The fourth proportional to 891.54, 1,337.54 and 343.58 is: 515.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.54 : 1,337.54 = 343.58 : x
  2. Step 2: Convert to fraction form
    891.54/1,337.54 = 343.58/x
  3. Step 3: Cross multiply
    891.54x = 1,337.54 × 343.58
  4. Step 4: Simplify right side
    891.54x = 459,545.31
  5. Step 5: Solve for x
    x = 459,545.31/891.54
  6. Step 6: Final answer
    x = 515.45

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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.