Home / 1,262.66-1,743.57-1,221.35

Finding the Fourth Proportional to 1,262.66, 1,743.57 and 1,221.35

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Solution

The fourth proportional to 1,262.66, 1,743.57 and 1,221.35 is: 1,686.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.66 : 1,743.57 = 1,221.35 : x
  2. Step 2: Convert to fraction form
    1,262.66/1,743.57 = 1,221.35/x
  3. Step 3: Cross multiply
    1,262.66x = 1,743.57 × 1,221.35
  4. Step 4: Simplify right side
    1,262.66x = 2,129,500.50
  5. Step 5: Solve for x
    x = 2,129,500.50/1,262.66
  6. Step 6: Final answer
    x = 1,686.53

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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.