Home / 2,161.28-2,982.54-1,217.12

Finding the Fourth Proportional to 2,161.28, 2,982.54 and 1,217.12

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Solution

The fourth proportional to 2,161.28, 2,982.54 and 1,217.12 is: 1,679.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.28 : 2,982.54 = 1,217.12 : x
  2. Step 2: Convert to fraction form
    2,161.28/2,982.54 = 1,217.12/x
  3. Step 3: Cross multiply
    2,161.28x = 2,982.54 × 1,217.12
  4. Step 4: Simplify right side
    2,161.28x = 3,630,109.08
  5. Step 5: Solve for x
    x = 3,630,109.08/2,161.28
  6. Step 6: Final answer
    x = 1,679.61

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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.