Home / 2,645.24-3,969.20-1,086.39

Finding the Fourth Proportional to 2,645.24, 3,969.20 and 1,086.39

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Solution

The fourth proportional to 2,645.24, 3,969.20 and 1,086.39 is: 1,630.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,645.24 : 3,969.20 = 1,086.39 : x
  2. Step 2: Convert to fraction form
    2,645.24/3,969.20 = 1,086.39/x
  3. Step 3: Cross multiply
    2,645.24x = 3,969.20 × 1,086.39
  4. Step 4: Simplify right side
    2,645.24x = 4,312,101.90
  5. Step 5: Solve for x
    x = 4,312,101.90/2,645.24
  6. Step 6: Final answer
    x = 1,630.14

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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.