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Finding the Fourth Proportional to 815,758.56, 1,223,662 and 389,339.34

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Solution

The fourth proportional to 815,758.56, 1,223,662 and 389,339.34 is: 584,020.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,758.56 : 1,223,662 = 389,339.34 : x
  2. Step 2: Convert to fraction form
    815,758.56/1,223,662 = 389,339.34/x
  3. Step 3: Cross multiply
    815,758.56x = 1,223,662 × 389,339.34
  4. Step 4: Simplify right side
    815,758.56x = 476,419,755,463.08
  5. Step 5: Solve for x
    x = 476,419,755,463.08/815,758.56
  6. Step 6: Final answer
    x = 584,020.54

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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.