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Finding the Fourth Proportional to 391,758.21, 540,749.39 and 222,105.33

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Solution

The fourth proportional to 391,758.21, 540,749.39 and 222,105.33 is: 306,575.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,758.21 : 540,749.39 = 222,105.33 : x
  2. Step 2: Convert to fraction form
    391,758.21/540,749.39 = 222,105.33/x
  3. Step 3: Cross multiply
    391,758.21x = 540,749.39 × 222,105.33
  4. Step 4: Simplify right side
    391,758.21x = 120,103,320,602.72
  5. Step 5: Solve for x
    x = 120,103,320,602.72/391,758.21
  6. Step 6: Final answer
    x = 306,575.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.