Home / 1,262.91-1,743.66-1,129.71

Finding the Fourth Proportional to 1,262.91, 1,743.66 and 1,129.71

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Solution

The fourth proportional to 1,262.91, 1,743.66 and 1,129.71 is: 1,559.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.91 : 1,743.66 = 1,129.71 : x
  2. Step 2: Convert to fraction form
    1,262.91/1,743.66 = 1,129.71/x
  3. Step 3: Cross multiply
    1,262.91x = 1,743.66 × 1,129.71
  4. Step 4: Simplify right side
    1,262.91x = 1,969,830.14
  5. Step 5: Solve for x
    x = 1,969,830.14/1,262.91
  6. Step 6: Final answer
    x = 1,559.75

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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.