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Finding the Fourth Proportional to 887.95, 1,331.79 and 449.20

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Solution

The fourth proportional to 887.95, 1,331.79 and 449.20 is: 673.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.95 : 1,331.79 = 449.20 : x
  2. Step 2: Convert to fraction form
    887.95/1,331.79 = 449.20/x
  3. Step 3: Cross multiply
    887.95x = 1,331.79 × 449.20
  4. Step 4: Simplify right side
    887.95x = 598,240.07
  5. Step 5: Solve for x
    x = 598,240.07/887.95
  6. Step 6: Final answer
    x = 673.73

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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.