Home / 2,169.61-3,256.09-1,129.88

Finding the Fourth Proportional to 2,169.61, 3,256.09 and 1,129.88

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Solution

The fourth proportional to 2,169.61, 3,256.09 and 1,129.88 is: 1,695.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.61 : 3,256.09 = 1,129.88 : x
  2. Step 2: Convert to fraction form
    2,169.61/3,256.09 = 1,129.88/x
  3. Step 3: Cross multiply
    2,169.61x = 3,256.09 × 1,129.88
  4. Step 4: Simplify right side
    2,169.61x = 3,678,974.69
  5. Step 5: Solve for x
    x = 3,678,974.69/2,169.61
  6. Step 6: Final answer
    x = 1,695.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.