Home / 2,139.28-3,209.88-1,163.92

Finding the Fourth Proportional to 2,139.28, 3,209.88 and 1,163.92

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Solution

The fourth proportional to 2,139.28, 3,209.88 and 1,163.92 is: 1,746.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.28 : 3,209.88 = 1,163.92 : x
  2. Step 2: Convert to fraction form
    2,139.28/3,209.88 = 1,163.92/x
  3. Step 3: Cross multiply
    2,139.28x = 3,209.88 × 1,163.92
  4. Step 4: Simplify right side
    2,139.28x = 3,736,043.53
  5. Step 5: Solve for x
    x = 3,736,043.53/2,139.28
  6. Step 6: Final answer
    x = 1,746.40

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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.