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Finding the Fourth Proportional to 880.95, 1,321.41 and 515.48

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Solution

The fourth proportional to 880.95, 1,321.41 and 515.48 is: 773.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.95 : 1,321.41 = 515.48 : x
  2. Step 2: Convert to fraction form
    880.95/1,321.41 = 515.48/x
  3. Step 3: Cross multiply
    880.95x = 1,321.41 × 515.48
  4. Step 4: Simplify right side
    880.95x = 681,160.43
  5. Step 5: Solve for x
    x = 681,160.43/880.95
  6. Step 6: Final answer
    x = 773.21

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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.