Home / 2,165.13-3,247.70-865.69

Finding the Fourth Proportional to 2,165.13, 3,247.70 and 865.69

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Solution

The fourth proportional to 2,165.13, 3,247.70 and 865.69 is: 1,298.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.13 : 3,247.70 = 865.69 : x
  2. Step 2: Convert to fraction form
    2,165.13/3,247.70 = 865.69/x
  3. Step 3: Cross multiply
    2,165.13x = 3,247.70 × 865.69
  4. Step 4: Simplify right side
    2,165.13x = 2,811,488.97
  5. Step 5: Solve for x
    x = 2,811,488.97/2,165.13
  6. Step 6: Final answer
    x = 1,298.53

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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.