Home / 815,354.54-1,223,129.07-394,327.88

Finding the Fourth Proportional to 815,354.54, 1,223,129.07 and 394,327.88

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Solution

The fourth proportional to 815,354.54, 1,223,129.07 and 394,327.88 is: 591,538.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,354.54 : 1,223,129.07 = 394,327.88 : x
  2. Step 2: Convert to fraction form
    815,354.54/1,223,129.07 = 394,327.88/x
  3. Step 3: Cross multiply
    815,354.54x = 1,223,129.07 × 394,327.88
  4. Step 4: Simplify right side
    815,354.54x = 482,313,887,023.83
  5. Step 5: Solve for x
    x = 482,313,887,023.83/815,354.54
  6. Step 6: Final answer
    x = 591,538.85

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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.