Home / 2,123.11-3,177.99-1,340.40

Finding the Fourth Proportional to 2,123.11, 3,177.99 and 1,340.40

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Solution

The fourth proportional to 2,123.11, 3,177.99 and 1,340.40 is: 2,006.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.11 : 3,177.99 = 1,340.40 : x
  2. Step 2: Convert to fraction form
    2,123.11/3,177.99 = 1,340.40/x
  3. Step 3: Cross multiply
    2,123.11x = 3,177.99 × 1,340.40
  4. Step 4: Simplify right side
    2,123.11x = 4,259,777.80
  5. Step 5: Solve for x
    x = 4,259,777.80/2,123.11
  6. Step 6: Final answer
    x = 2,006.39

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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.