Home / 1,236.72-1,693.68-1,220.52

Finding the Fourth Proportional to 1,236.72, 1,693.68 and 1,220.52

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Solution

The fourth proportional to 1,236.72, 1,693.68 and 1,220.52 is: 1,671.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.72 : 1,693.68 = 1,220.52 : x
  2. Step 2: Convert to fraction form
    1,236.72/1,693.68 = 1,220.52/x
  3. Step 3: Cross multiply
    1,236.72x = 1,693.68 × 1,220.52
  4. Step 4: Simplify right side
    1,236.72x = 2,067,170.31
  5. Step 5: Solve for x
    x = 2,067,170.31/1,236.72
  6. Step 6: Final answer
    x = 1,671.49

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.