Home / 1,272.26-1,764.71-1,238.56

Finding the Fourth Proportional to 1,272.26, 1,764.71 and 1,238.56

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Solution

The fourth proportional to 1,272.26, 1,764.71 and 1,238.56 is: 1,717.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.26 : 1,764.71 = 1,238.56 : x
  2. Step 2: Convert to fraction form
    1,272.26/1,764.71 = 1,238.56/x
  3. Step 3: Cross multiply
    1,272.26x = 1,764.71 × 1,238.56
  4. Step 4: Simplify right side
    1,272.26x = 2,185,699.22
  5. Step 5: Solve for x
    x = 2,185,699.22/1,272.26
  6. Step 6: Final answer
    x = 1,717.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.