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Finding the Fourth Proportional to 391,896.91, 540,860.03 and 222,112.81

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Solution

The fourth proportional to 391,896.91, 540,860.03 and 222,112.81 is: 306,539.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,896.91 : 540,860.03 = 222,112.81 : x
  2. Step 2: Convert to fraction form
    391,896.91/540,860.03 = 222,112.81/x
  3. Step 3: Cross multiply
    391,896.91x = 540,860.03 × 222,112.81
  4. Step 4: Simplify right side
    391,896.91x = 120,131,942,987.42
  5. Step 5: Solve for x
    x = 120,131,942,987.42/391,896.91
  6. Step 6: Final answer
    x = 306,539.65

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1.5x scale

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.