Home / 2,120.08-3,180.66-821.92

Finding the Fourth Proportional to 2,120.08, 3,180.66 and 821.92

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Solution

The fourth proportional to 2,120.08, 3,180.66 and 821.92 is: 1,233.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.08 : 3,180.66 = 821.92 : x
  2. Step 2: Convert to fraction form
    2,120.08/3,180.66 = 821.92/x
  3. Step 3: Cross multiply
    2,120.08x = 3,180.66 × 821.92
  4. Step 4: Simplify right side
    2,120.08x = 2,614,248.07
  5. Step 5: Solve for x
    x = 2,614,248.07/2,120.08
  6. Step 6: Final answer
    x = 1,233.09

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1.5x scale

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.