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Finding the Fourth Proportional to 391,871.08, 540,788.34 and 222,101.56

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Solution

The fourth proportional to 391,871.08, 540,788.34 and 222,101.56 is: 306,503.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,871.08 : 540,788.34 = 222,101.56 : x
  2. Step 2: Convert to fraction form
    391,871.08/540,788.34 = 222,101.56/x
  3. Step 3: Cross multiply
    391,871.08x = 540,788.34 × 222,101.56
  4. Step 4: Simplify right side
    391,871.08x = 120,109,933,943.81
  5. Step 5: Solve for x
    x = 120,109,933,943.81/391,871.08
  6. Step 6: Final answer
    x = 306,503.69

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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.