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Finding the Fourth Proportional to 391,481.65, 587,234.66 and 186,271.34

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Solution

The fourth proportional to 391,481.65, 587,234.66 and 186,271.34 is: 279,412.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,481.65 : 587,234.66 = 186,271.34 : x
  2. Step 2: Convert to fraction form
    391,481.65/587,234.66 = 186,271.34/x
  3. Step 3: Cross multiply
    391,481.65x = 587,234.66 × 186,271.34
  4. Step 4: Simplify right side
    391,481.65x = 109,384,987,012.64
  5. Step 5: Solve for x
    x = 109,384,987,012.64/391,481.65
  6. Step 6: Final answer
    x = 279,412.81

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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.