Home / 2,129,138.40-3,196,040.40-1,331,320.80

Finding the Fourth Proportional to 2,129,138.40, 3,196,040.40 and 1,331,320.80

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Solution

The fourth proportional to 2,129,138.40, 3,196,040.40 and 1,331,320.80 is: 1,998,439.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129,138.40 : 3,196,040.40 = 1,331,320.80 : x
  2. Step 2: Convert to fraction form
    2,129,138.40/3,196,040.40 = 1,331,320.80/x
  3. Step 3: Cross multiply
    2,129,138.40x = 3,196,040.40 × 1,331,320.80
  4. Step 4: Simplify right side
    2,129,138.40x = 4,254,955,062,160.32
  5. Step 5: Solve for x
    x = 4,254,955,062,160.32/2,129,138.40
  6. Step 6: Final answer
    x = 1,998,439.87

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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.