Home / 3,965.90-5,475.17-2,708.78

Finding the Fourth Proportional to 3,965.90, 5,475.17 and 2,708.78

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Solution

The fourth proportional to 3,965.90, 5,475.17 and 2,708.78 is: 3,739.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,965.90 : 5,475.17 = 2,708.78 : x
  2. Step 2: Convert to fraction form
    3,965.90/5,475.17 = 2,708.78/x
  3. Step 3: Cross multiply
    3,965.90x = 5,475.17 × 2,708.78
  4. Step 4: Simplify right side
    3,965.90x = 14,831,010.39
  5. Step 5: Solve for x
    x = 14,831,010.39/3,965.90
  6. Step 6: Final answer
    x = 3,739.64

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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.