Home / 2,631.15-3,939.44-1,329.90

Finding the Fourth Proportional to 2,631.15, 3,939.44 and 1,329.90

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Solution

The fourth proportional to 2,631.15, 3,939.44 and 1,329.90 is: 1,991.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.15 : 3,939.44 = 1,329.90 : x
  2. Step 2: Convert to fraction form
    2,631.15/3,939.44 = 1,329.90/x
  3. Step 3: Cross multiply
    2,631.15x = 3,939.44 × 1,329.90
  4. Step 4: Simplify right side
    2,631.15x = 5,239,054.61
  5. Step 5: Solve for x
    x = 5,239,054.61/2,631.15
  6. Step 6: Final answer
    x = 1,991.17

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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.