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Finding the Fourth Proportional to 381,438.58, 571,935.39 and 115,119.22

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Solution

The fourth proportional to 381,438.58, 571,935.39 and 115,119.22 is: 172,611.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,438.58 : 571,935.39 = 115,119.22 : x
  2. Step 2: Convert to fraction form
    381,438.58/571,935.39 = 115,119.22/x
  3. Step 3: Cross multiply
    381,438.58x = 571,935.39 × 115,119.22
  4. Step 4: Simplify right side
    381,438.58x = 65,840,755,987.20
  5. Step 5: Solve for x
    x = 65,840,755,987.20/381,438.58
  6. Step 6: Final answer
    x = 172,611.68

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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.