Home / 2,275.16-3,140.32-1,391.71

Finding the Fourth Proportional to 2,275.16, 3,140.32 and 1,391.71

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Solution

The fourth proportional to 2,275.16, 3,140.32 and 1,391.71 is: 1,920.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.16 : 3,140.32 = 1,391.71 : x
  2. Step 2: Convert to fraction form
    2,275.16/3,140.32 = 1,391.71/x
  3. Step 3: Cross multiply
    2,275.16x = 3,140.32 × 1,391.71
  4. Step 4: Simplify right side
    2,275.16x = 4,370,403.08
  5. Step 5: Solve for x
    x = 4,370,403.08/2,275.16
  6. Step 6: Final answer
    x = 1,920.92

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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.