Home / 2,801.96-4,199.70-1,979

Finding the Fourth Proportional to 2,801.96, 4,199.70 and 1,979

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Solution

The fourth proportional to 2,801.96, 4,199.70 and 1,979 is: 2,966.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,801.96 : 4,199.70 = 1,979 : x
  2. Step 2: Convert to fraction form
    2,801.96/4,199.70 = 1,979/x
  3. Step 3: Cross multiply
    2,801.96x = 4,199.70 × 1,979
  4. Step 4: Simplify right side
    2,801.96x = 8,311,206.30
  5. Step 5: Solve for x
    x = 8,311,206.30/2,801.96
  6. Step 6: Final answer
    x = 2,966.21

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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.