Home / 2,275.71-3,140.63-1,281.38

Finding the Fourth Proportional to 2,275.71, 3,140.63 and 1,281.38

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Solution

The fourth proportional to 2,275.71, 3,140.63 and 1,281.38 is: 1,768.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.71 : 3,140.63 = 1,281.38 : x
  2. Step 2: Convert to fraction form
    2,275.71/3,140.63 = 1,281.38/x
  3. Step 3: Cross multiply
    2,275.71x = 3,140.63 × 1,281.38
  4. Step 4: Simplify right side
    2,275.71x = 4,024,318.36
  5. Step 5: Solve for x
    x = 4,024,318.36/2,275.71
  6. Step 6: Final answer
    x = 1,768.38

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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.