Home / 2,221.60-3,326.70-2,155.90

Finding the Fourth Proportional to 2,221.60, 3,326.70 and 2,155.90

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Solution

The fourth proportional to 2,221.60, 3,326.70 and 2,155.90 is: 3,228.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.60 : 3,326.70 = 2,155.90 : x
  2. Step 2: Convert to fraction form
    2,221.60/3,326.70 = 2,155.90/x
  3. Step 3: Cross multiply
    2,221.60x = 3,326.70 × 2,155.90
  4. Step 4: Simplify right side
    2,221.60x = 7,172,032.53
  5. Step 5: Solve for x
    x = 7,172,032.53/2,221.60
  6. Step 6: Final answer
    x = 3,228.32

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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.