Home / 2,148.92-3,219.22-1,221.68

Finding the Fourth Proportional to 2,148.92, 3,219.22 and 1,221.68

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Solution

The fourth proportional to 2,148.92, 3,219.22 and 1,221.68 is: 1,830.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.92 : 3,219.22 = 1,221.68 : x
  2. Step 2: Convert to fraction form
    2,148.92/3,219.22 = 1,221.68/x
  3. Step 3: Cross multiply
    2,148.92x = 3,219.22 × 1,221.68
  4. Step 4: Simplify right side
    2,148.92x = 3,932,856.69
  5. Step 5: Solve for x
    x = 3,932,856.69/2,148.92
  6. Step 6: Final answer
    x = 1,830.16

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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.