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Finding the Fourth Proportional to 393,067.28, 589,612.43 and 108,760.13

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Solution

The fourth proportional to 393,067.28, 589,612.43 and 108,760.13 is: 163,143.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,067.28 : 589,612.43 = 108,760.13 : x
  2. Step 2: Convert to fraction form
    393,067.28/589,612.43 = 108,760.13/x
  3. Step 3: Cross multiply
    393,067.28x = 589,612.43 × 108,760.13
  4. Step 4: Simplify right side
    393,067.28x = 64,126,327,387.87
  5. Step 5: Solve for x
    x = 64,126,327,387.87/393,067.28
  6. Step 6: Final answer
    x = 163,143.39

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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.