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Finding the Fourth Proportional to 2,113.92, 2,917.28 and 1,229.92

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Solution

The fourth proportional to 2,113.92, 2,917.28 and 1,229.92 is: 1,697.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.92 : 2,917.28 = 1,229.92 : x
  2. Step 2: Convert to fraction form
    2,113.92/2,917.28 = 1,229.92/x
  3. Step 3: Cross multiply
    2,113.92x = 2,917.28 × 1,229.92
  4. Step 4: Simplify right side
    2,113.92x = 3,588,016.80
  5. Step 5: Solve for x
    x = 3,588,016.80/2,113.92
  6. Step 6: Final answer
    x = 1,697.33

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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.