Home / 1,642.12-2,266.26-1,012.80

Finding the Fourth Proportional to 1,642.12, 2,266.26 and 1,012.80

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Solution

The fourth proportional to 1,642.12, 2,266.26 and 1,012.80 is: 1,397.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.12 : 2,266.26 = 1,012.80 : x
  2. Step 2: Convert to fraction form
    1,642.12/2,266.26 = 1,012.80/x
  3. Step 3: Cross multiply
    1,642.12x = 2,266.26 × 1,012.80
  4. Step 4: Simplify right side
    1,642.12x = 2,295,268.13
  5. Step 5: Solve for x
    x = 2,295,268.13/1,642.12
  6. Step 6: Final answer
    x = 1,397.75

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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.