Home / 1,936.71-2,672.50-1,139.90

Finding the Fourth Proportional to 1,936.71, 2,672.50 and 1,139.90

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Solution

The fourth proportional to 1,936.71, 2,672.50 and 1,139.90 is: 1,572.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,936.71 : 2,672.50 = 1,139.90 : x
  2. Step 2: Convert to fraction form
    1,936.71/2,672.50 = 1,139.90/x
  3. Step 3: Cross multiply
    1,936.71x = 2,672.50 × 1,139.90
  4. Step 4: Simplify right side
    1,936.71x = 3,046,382.75
  5. Step 5: Solve for x
    x = 3,046,382.75/1,936.71
  6. Step 6: Final answer
    x = 1,572.97

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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.