Home / 2,716.78-3,748.89-2,158.60

Finding the Fourth Proportional to 2,716.78, 3,748.89 and 2,158.60

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Solution

The fourth proportional to 2,716.78, 3,748.89 and 2,158.60 is: 2,978.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,716.78 : 3,748.89 = 2,158.60 : x
  2. Step 2: Convert to fraction form
    2,716.78/3,748.89 = 2,158.60/x
  3. Step 3: Cross multiply
    2,716.78x = 3,748.89 × 2,158.60
  4. Step 4: Simplify right side
    2,716.78x = 8,092,352.68
  5. Step 5: Solve for x
    x = 8,092,352.68/2,716.78
  6. Step 6: Final answer
    x = 2,978.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.