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Finding the Fourth Proportional to 891.98, 1,338.16 and 344.31

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Solution

The fourth proportional to 891.98, 1,338.16 and 344.31 is: 516.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.98 : 1,338.16 = 344.31 : x
  2. Step 2: Convert to fraction form
    891.98/1,338.16 = 344.31/x
  3. Step 3: Cross multiply
    891.98x = 1,338.16 × 344.31
  4. Step 4: Simplify right side
    891.98x = 460,741.87
  5. Step 5: Solve for x
    x = 460,741.87/891.98
  6. Step 6: Final answer
    x = 516.54

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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.