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Finding the Fourth Proportional to 3,190.80, 4,402.80 and 2,011.80

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Solution

The fourth proportional to 3,190.80, 4,402.80 and 2,011.80 is: 2,775.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,190.80 : 4,402.80 = 2,011.80 : x
  2. Step 2: Convert to fraction form
    3,190.80/4,402.80 = 2,011.80/x
  3. Step 3: Cross multiply
    3,190.80x = 4,402.80 × 2,011.80
  4. Step 4: Simplify right side
    3,190.80x = 8,857,553.04
  5. Step 5: Solve for x
    x = 8,857,553.04/3,190.80
  6. Step 6: Final answer
    x = 2,775.97

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1.5x scale

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.