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Finding the Fourth Proportional to 2,001.05, 3,001.79 and 769.50

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Solution

The fourth proportional to 2,001.05, 3,001.79 and 769.50 is: 1,154.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,001.05 : 3,001.79 = 769.50 : x
  2. Step 2: Convert to fraction form
    2,001.05/3,001.79 = 769.50/x
  3. Step 3: Cross multiply
    2,001.05x = 3,001.79 × 769.50
  4. Step 4: Simplify right side
    2,001.05x = 2,309,873.56
  5. Step 5: Solve for x
    x = 2,309,873.56/2,001.05
  6. Step 6: Final answer
    x = 1,154.33

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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.