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Finding the Fourth Proportional to 815,355.66, 1,223,130.76 and 394,329

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Solution

The fourth proportional to 815,355.66, 1,223,130.76 and 394,329 is: 591,540.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,355.66 : 1,223,130.76 = 394,329 : x
  2. Step 2: Convert to fraction form
    815,355.66/1,223,130.76 = 394,329/x
  3. Step 3: Cross multiply
    815,355.66x = 1,223,130.76 × 394,329
  4. Step 4: Simplify right side
    815,355.66x = 482,315,928,474.22
  5. Step 5: Solve for x
    x = 482,315,928,474.22/815,355.66
  6. Step 6: Final answer
    x = 591,540.54

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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.