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Finding the Fourth Proportional to 2,720.97, 4,081.50 and 773.22

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Solution

The fourth proportional to 2,720.97, 4,081.50 and 773.22 is: 1,159.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.97 : 4,081.50 = 773.22 : x
  2. Step 2: Convert to fraction form
    2,720.97/4,081.50 = 773.22/x
  3. Step 3: Cross multiply
    2,720.97x = 4,081.50 × 773.22
  4. Step 4: Simplify right side
    2,720.97x = 3,155,897.43
  5. Step 5: Solve for x
    x = 3,155,897.43/2,720.97
  6. Step 6: Final answer
    x = 1,159.84

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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.