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Finding the Fourth Proportional to 391,584.30, 587,398.77 and 111,079.50

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Solution

The fourth proportional to 391,584.30, 587,398.77 and 111,079.50 is: 166,625.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,584.30 : 587,398.77 = 111,079.50 : x
  2. Step 2: Convert to fraction form
    391,584.30/587,398.77 = 111,079.50/x
  3. Step 3: Cross multiply
    391,584.30x = 587,398.77 × 111,079.50
  4. Step 4: Simplify right side
    391,584.30x = 65,247,961,672.22
  5. Step 5: Solve for x
    x = 65,247,961,672.22/391,584.30
  6. Step 6: Final answer
    x = 166,625.58

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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.