Home / 2,539.12-3,808.72-979.84

Finding the Fourth Proportional to 2,539.12, 3,808.72 and 979.84

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Solution

The fourth proportional to 2,539.12, 3,808.72 and 979.84 is: 1,469.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,539.12 : 3,808.72 = 979.84 : x
  2. Step 2: Convert to fraction form
    2,539.12/3,808.72 = 979.84/x
  3. Step 3: Cross multiply
    2,539.12x = 3,808.72 × 979.84
  4. Step 4: Simplify right side
    2,539.12x = 3,731,936.20
  5. Step 5: Solve for x
    x = 3,731,936.20/2,539.12
  6. Step 6: Final answer
    x = 1,469.78

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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.