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Finding the Fourth Proportional to 391,791.94, 587,909.34 and 167,131.14

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Solution

The fourth proportional to 391,791.94, 587,909.34 and 167,131.14 is: 250,791.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,791.94 : 587,909.34 = 167,131.14 : x
  2. Step 2: Convert to fraction form
    391,791.94/587,909.34 = 167,131.14/x
  3. Step 3: Cross multiply
    391,791.94x = 587,909.34 × 167,131.14
  4. Step 4: Simplify right side
    391,791.94x = 98,257,958,210.85
  5. Step 5: Solve for x
    x = 98,257,958,210.85/391,791.94
  6. Step 6: Final answer
    x = 250,791.17

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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.