Home / 2,275.51-3,139.94-1,281.13

Finding the Fourth Proportional to 2,275.51, 3,139.94 and 1,281.13

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Solution

The fourth proportional to 2,275.51, 3,139.94 and 1,281.13 is: 1,767.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.51 : 3,139.94 = 1,281.13 : x
  2. Step 2: Convert to fraction form
    2,275.51/3,139.94 = 1,281.13/x
  3. Step 3: Cross multiply
    2,275.51x = 3,139.94 × 1,281.13
  4. Step 4: Simplify right side
    2,275.51x = 4,022,671.33
  5. Step 5: Solve for x
    x = 4,022,671.33/2,275.51
  6. Step 6: Final answer
    x = 1,767.81

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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.