Home / 2,275.47-3,140.73-1,391.13

Finding the Fourth Proportional to 2,275.47, 3,140.73 and 1,391.13

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Solution

The fourth proportional to 2,275.47, 3,140.73 and 1,391.13 is: 1,920.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.47 : 3,140.73 = 1,391.13 : x
  2. Step 2: Convert to fraction form
    2,275.47/3,140.73 = 1,391.13/x
  3. Step 3: Cross multiply
    2,275.47x = 3,140.73 × 1,391.13
  4. Step 4: Simplify right side
    2,275.47x = 4,369,163.72
  5. Step 5: Solve for x
    x = 4,369,163.72/2,275.47
  6. Step 6: Final answer
    x = 1,920.11

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1.5x scale

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.