Home / 2,275.31-3,140.50-1,391.87

Finding the Fourth Proportional to 2,275.31, 3,140.50 and 1,391.87

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Solution

The fourth proportional to 2,275.31, 3,140.50 and 1,391.87 is: 1,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.31 : 3,140.50 = 1,391.87 : x
  2. Step 2: Convert to fraction form
    2,275.31/3,140.50 = 1,391.87/x
  3. Step 3: Cross multiply
    2,275.31x = 3,140.50 × 1,391.87
  4. Step 4: Simplify right side
    2,275.31x = 4,371,167.74
  5. Step 5: Solve for x
    x = 4,371,167.74/2,275.31
  6. Step 6: Final answer
    x = 1,921.13

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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.