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Finding the Fourth Proportional to 378,808.86, 522,845.67 and 217,757.34

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Solution

The fourth proportional to 378,808.86, 522,845.67 and 217,757.34 is: 300,556.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,808.86 : 522,845.67 = 217,757.34 : x
  2. Step 2: Convert to fraction form
    378,808.86/522,845.67 = 217,757.34/x
  3. Step 3: Cross multiply
    378,808.86x = 522,845.67 × 217,757.34
  4. Step 4: Simplify right side
    378,808.86x = 113,853,482,329.72
  5. Step 5: Solve for x
    x = 113,853,482,329.72/378,808.86
  6. Step 6: Final answer
    x = 300,556.55

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1.5x scale

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.