Home / 2,266.87-3,128.31-1,272.13

Finding the Fourth Proportional to 2,266.87, 3,128.31 and 1,272.13

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Solution

The fourth proportional to 2,266.87, 3,128.31 and 1,272.13 is: 1,755.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,266.87 : 3,128.31 = 1,272.13 : x
  2. Step 2: Convert to fraction form
    2,266.87/3,128.31 = 1,272.13/x
  3. Step 3: Cross multiply
    2,266.87x = 3,128.31 × 1,272.13
  4. Step 4: Simplify right side
    2,266.87x = 3,979,617.00
  5. Step 5: Solve for x
    x = 3,979,617.00/2,266.87
  6. Step 6: Final answer
    x = 1,755.55

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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.