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Finding the Fourth Proportional to 383,418.12, 529,119.11 and 222,368.66

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Solution

The fourth proportional to 383,418.12, 529,119.11 and 222,368.66 is: 306,869.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,418.12 : 529,119.11 = 222,368.66 : x
  2. Step 2: Convert to fraction form
    383,418.12/529,119.11 = 222,368.66/x
  3. Step 3: Cross multiply
    383,418.12x = 529,119.11 × 222,368.66
  4. Step 4: Simplify right side
    383,418.12x = 117,659,507,471.09
  5. Step 5: Solve for x
    x = 117,659,507,471.09/383,418.12
  6. Step 6: Final answer
    x = 306,869.97

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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.