Home / 3,178.27-4,385.48-1,998.50

Finding the Fourth Proportional to 3,178.27, 4,385.48 and 1,998.50

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Solution

The fourth proportional to 3,178.27, 4,385.48 and 1,998.50 is: 2,757.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.27 : 4,385.48 = 1,998.50 : x
  2. Step 2: Convert to fraction form
    3,178.27/4,385.48 = 1,998.50/x
  3. Step 3: Cross multiply
    3,178.27x = 4,385.48 × 1,998.50
  4. Step 4: Simplify right side
    3,178.27x = 8,764,381.78
  5. Step 5: Solve for x
    x = 8,764,381.78/3,178.27
  6. Step 6: Final answer
    x = 2,757.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.