Home / 2,140.22-2,952.92-1,289.28

Finding the Fourth Proportional to 2,140.22, 2,952.92 and 1,289.28

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Solution

The fourth proportional to 2,140.22, 2,952.92 and 1,289.28 is: 1,778.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.22 : 2,952.92 = 1,289.28 : x
  2. Step 2: Convert to fraction form
    2,140.22/2,952.92 = 1,289.28/x
  3. Step 3: Cross multiply
    2,140.22x = 2,952.92 × 1,289.28
  4. Step 4: Simplify right side
    2,140.22x = 3,807,140.70
  5. Step 5: Solve for x
    x = 3,807,140.70/2,140.22
  6. Step 6: Final answer
    x = 1,778.85

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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.