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Finding the Fourth Proportional to 2,716.71, 4,075.17 and 961.90

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Solution

The fourth proportional to 2,716.71, 4,075.17 and 961.90 is: 1,442.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,716.71 : 4,075.17 = 961.90 : x
  2. Step 2: Convert to fraction form
    2,716.71/4,075.17 = 961.90/x
  3. Step 3: Cross multiply
    2,716.71x = 4,075.17 × 961.90
  4. Step 4: Simplify right side
    2,716.71x = 3,919,906.39
  5. Step 5: Solve for x
    x = 3,919,906.39/2,716.71
  6. Step 6: Final answer
    x = 1,442.89

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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.