Home / 3,988.05-5,979.89-1,908.59

Finding the Fourth Proportional to 3,988.05, 5,979.89 and 1,908.59

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Solution

The fourth proportional to 3,988.05, 5,979.89 and 1,908.59 is: 2,861.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.05 : 5,979.89 = 1,908.59 : x
  2. Step 2: Convert to fraction form
    3,988.05/5,979.89 = 1,908.59/x
  3. Step 3: Cross multiply
    3,988.05x = 5,979.89 × 1,908.59
  4. Step 4: Simplify right side
    3,988.05x = 11,413,118.81
  5. Step 5: Solve for x
    x = 11,413,118.81/3,988.05
  6. Step 6: Final answer
    x = 2,861.83

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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.