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Finding the Fourth Proportional to 391,896.79, 540,859.86 and 222,112.69

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Solution

The fourth proportional to 391,896.79, 540,859.86 and 222,112.69 is: 306,539.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,896.79 : 540,859.86 = 222,112.69 : x
  2. Step 2: Convert to fraction form
    391,896.79/540,859.86 = 222,112.69/x
  3. Step 3: Cross multiply
    391,896.79x = 540,859.86 × 222,112.69
  4. Step 4: Simplify right side
    391,896.79x = 120,131,837,065.47
  5. Step 5: Solve for x
    x = 120,131,837,065.47/391,896.79
  6. Step 6: Final answer
    x = 306,539.48

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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.