Home / 391,872.09-540,783.63-222,107.43

Finding the Fourth Proportional to 391,872.09, 540,783.63 and 222,107.43

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Solution

The fourth proportional to 391,872.09, 540,783.63 and 222,107.43 is: 306,508.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,872.09 : 540,783.63 = 222,107.43 : x
  2. Step 2: Convert to fraction form
    391,872.09/540,783.63 = 222,107.43/x
  3. Step 3: Cross multiply
    391,872.09x = 540,783.63 × 222,107.43
  4. Step 4: Simplify right side
    391,872.09x = 120,112,062,245.37
  5. Step 5: Solve for x
    x = 120,112,062,245.37/391,872.09
  6. Step 6: Final answer
    x = 306,508.34

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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.