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Finding the Fourth Proportional to 3,990.68, 5,507.79 and 3,044.67

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Solution

The fourth proportional to 3,990.68, 5,507.79 and 3,044.67 is: 4,202.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.68 : 5,507.79 = 3,044.67 : x
  2. Step 2: Convert to fraction form
    3,990.68/5,507.79 = 3,044.67/x
  3. Step 3: Cross multiply
    3,990.68x = 5,507.79 × 3,044.67
  4. Step 4: Simplify right side
    3,990.68x = 16,769,402.98
  5. Step 5: Solve for x
    x = 16,769,402.98/3,990.68
  6. Step 6: Final answer
    x = 4,202.15

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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.