Home / 2,155.50-3,233.64-1,425.68

Finding the Fourth Proportional to 2,155.50, 3,233.64 and 1,425.68

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Solution

The fourth proportional to 2,155.50, 3,233.64 and 1,425.68 is: 2,138.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.50 : 3,233.64 = 1,425.68 : x
  2. Step 2: Convert to fraction form
    2,155.50/3,233.64 = 1,425.68/x
  3. Step 3: Cross multiply
    2,155.50x = 3,233.64 × 1,425.68
  4. Step 4: Simplify right side
    2,155.50x = 4,610,135.88
  5. Step 5: Solve for x
    x = 4,610,135.88/2,155.50
  6. Step 6: Final answer
    x = 2,138.78

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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.