Home / 2,122.11-3,176.49-1,339.40

Finding the Fourth Proportional to 2,122.11, 3,176.49 and 1,339.40

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Solution

The fourth proportional to 2,122.11, 3,176.49 and 1,339.40 is: 2,004.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.11 : 3,176.49 = 1,339.40 : x
  2. Step 2: Convert to fraction form
    2,122.11/3,176.49 = 1,339.40/x
  3. Step 3: Cross multiply
    2,122.11x = 3,176.49 × 1,339.40
  4. Step 4: Simplify right side
    2,122.11x = 4,254,591.76
  5. Step 5: Solve for x
    x = 4,254,591.76/2,122.11
  6. Step 6: Final answer
    x = 2,004.89

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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.