Home / 1,236.72-1,718.66-1,221.23

Finding the Fourth Proportional to 1,236.72, 1,718.66 and 1,221.23

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Solution

The fourth proportional to 1,236.72, 1,718.66 and 1,221.23 is: 1,697.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.72 : 1,718.66 = 1,221.23 : x
  2. Step 2: Convert to fraction form
    1,236.72/1,718.66 = 1,221.23/x
  3. Step 3: Cross multiply
    1,236.72x = 1,718.66 × 1,221.23
  4. Step 4: Simplify right side
    1,236.72x = 2,098,868.25
  5. Step 5: Solve for x
    x = 2,098,868.25/1,236.72
  6. Step 6: Final answer
    x = 1,697.13

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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.