Home / 821,171.40-1,231,286.76-252,404.52

Finding the Fourth Proportional to 821,171.40, 1,231,286.76 and 252,404.52

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Solution

The fourth proportional to 821,171.40, 1,231,286.76 and 252,404.52 is: 378,462.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,171.40 : 1,231,286.76 = 252,404.52 : x
  2. Step 2: Convert to fraction form
    821,171.40/1,231,286.76 = 252,404.52/x
  3. Step 3: Cross multiply
    821,171.40x = 1,231,286.76 × 252,404.52
  4. Step 4: Simplify right side
    821,171.40x = 310,782,343,640.16
  5. Step 5: Solve for x
    x = 310,782,343,640.16/821,171.40
  6. Step 6: Final answer
    x = 378,462.21

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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.