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Finding the Fourth Proportional to 2,222.80, 3,327.80 and 1,992.40

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Solution

The fourth proportional to 2,222.80, 3,327.80 and 1,992.40 is: 2,982.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,222.80 : 3,327.80 = 1,992.40 : x
  2. Step 2: Convert to fraction form
    2,222.80/3,327.80 = 1,992.40/x
  3. Step 3: Cross multiply
    2,222.80x = 3,327.80 × 1,992.40
  4. Step 4: Simplify right side
    2,222.80x = 6,630,308.72
  5. Step 5: Solve for x
    x = 6,630,308.72/2,222.80
  6. Step 6: Final answer
    x = 2,982.86

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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.