Home / 1,556.11-2,147.68-996.55

Finding the Fourth Proportional to 1,556.11, 2,147.68 and 996.55

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Solution

The fourth proportional to 1,556.11, 2,147.68 and 996.55 is: 1,375.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.11 : 2,147.68 = 996.55 : x
  2. Step 2: Convert to fraction form
    1,556.11/2,147.68 = 996.55/x
  3. Step 3: Cross multiply
    1,556.11x = 2,147.68 × 996.55
  4. Step 4: Simplify right side
    1,556.11x = 2,140,262.64
  5. Step 5: Solve for x
    x = 2,140,262.64/1,556.11
  6. Step 6: Final answer
    x = 1,375.40

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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.