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Finding the Fourth Proportional to 395,107.36, 545,213.72 and 231,796.78

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Solution

The fourth proportional to 395,107.36, 545,213.72 and 231,796.78 is: 319,859.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,107.36 : 545,213.72 = 231,796.78 : x
  2. Step 2: Convert to fraction form
    395,107.36/545,213.72 = 231,796.78/x
  3. Step 3: Cross multiply
    395,107.36x = 545,213.72 × 231,796.78
  4. Step 4: Simplify right side
    395,107.36x = 126,378,784,707.82
  5. Step 5: Solve for x
    x = 126,378,784,707.82/395,107.36
  6. Step 6: Final answer
    x = 319,859.35

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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.