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Finding the Fourth Proportional to 891.95, 1,338.42 and 481.07

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Solution

The fourth proportional to 891.95, 1,338.42 and 481.07 is: 721.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.95 : 1,338.42 = 481.07 : x
  2. Step 2: Convert to fraction form
    891.95/1,338.42 = 481.07/x
  3. Step 3: Cross multiply
    891.95x = 1,338.42 × 481.07
  4. Step 4: Simplify right side
    891.95x = 643,878.86
  5. Step 5: Solve for x
    x = 643,878.86/891.95
  6. Step 6: Final answer
    x = 721.88

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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.