Home / 2,266.85-3,128.11-1,272.12

Finding the Fourth Proportional to 2,266.85, 3,128.11 and 1,272.12

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Solution

The fourth proportional to 2,266.85, 3,128.11 and 1,272.12 is: 1,755.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,266.85 : 3,128.11 = 1,272.12 : x
  2. Step 2: Convert to fraction form
    2,266.85/3,128.11 = 1,272.12/x
  3. Step 3: Cross multiply
    2,266.85x = 3,128.11 × 1,272.12
  4. Step 4: Simplify right side
    2,266.85x = 3,979,331.29
  5. Step 5: Solve for x
    x = 3,979,331.29/2,266.85
  6. Step 6: Final answer
    x = 1,755.45

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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.