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Finding the Fourth Proportional to 391,499.58, 587,336.89 and 125,276.07

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Solution

The fourth proportional to 391,499.58, 587,336.89 and 125,276.07 is: 187,942.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,499.58 : 587,336.89 = 125,276.07 : x
  2. Step 2: Convert to fraction form
    391,499.58/587,336.89 = 125,276.07/x
  3. Step 3: Cross multiply
    391,499.58x = 587,336.89 × 125,276.07
  4. Step 4: Simplify right side
    391,499.58x = 73,579,257,345.22
  5. Step 5: Solve for x
    x = 73,579,257,345.22/391,499.58
  6. Step 6: Final answer
    x = 187,942.11

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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.