Home / 3,451.80-5,178.31-1,605

Finding the Fourth Proportional to 3,451.80, 5,178.31 and 1,605

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Solution

The fourth proportional to 3,451.80, 5,178.31 and 1,605 is: 2,407.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,451.80 : 5,178.31 = 1,605 : x
  2. Step 2: Convert to fraction form
    3,451.80/5,178.31 = 1,605/x
  3. Step 3: Cross multiply
    3,451.80x = 5,178.31 × 1,605
  4. Step 4: Simplify right side
    3,451.80x = 8,311,187.55
  5. Step 5: Solve for x
    x = 8,311,187.55/3,451.80
  6. Step 6: Final answer
    x = 2,407.78

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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.