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Finding the Fourth Proportional to 391,559.27, 587,367.25 and 121,651.88

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Solution

The fourth proportional to 391,559.27, 587,367.25 and 121,651.88 is: 182,486.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,559.27 : 587,367.25 = 121,651.88 : x
  2. Step 2: Convert to fraction form
    391,559.27/587,367.25 = 121,651.88/x
  3. Step 3: Cross multiply
    391,559.27x = 587,367.25 × 121,651.88
  4. Step 4: Simplify right side
    391,559.27x = 71,454,326,971.96
  5. Step 5: Solve for x
    x = 71,454,326,971.96/391,559.27
  6. Step 6: Final answer
    x = 182,486.62

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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.