Home / 1,958.12-2,939.11-1,331.50

Finding the Fourth Proportional to 1,958.12, 2,939.11 and 1,331.50

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Solution

The fourth proportional to 1,958.12, 2,939.11 and 1,331.50 is: 1,998.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.12 : 2,939.11 = 1,331.50 : x
  2. Step 2: Convert to fraction form
    1,958.12/2,939.11 = 1,331.50/x
  3. Step 3: Cross multiply
    1,958.12x = 2,939.11 × 1,331.50
  4. Step 4: Simplify right side
    1,958.12x = 3,913,424.97
  5. Step 5: Solve for x
    x = 3,913,424.97/1,958.12
  6. Step 6: Final answer
    x = 1,998.56

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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.