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Finding the Fourth Proportional to 390,474.46, 585,199.77 and 222,072.22

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Solution

The fourth proportional to 390,474.46, 585,199.77 and 222,072.22 is: 332,817.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,474.46 : 585,199.77 = 222,072.22 : x
  2. Step 2: Convert to fraction form
    390,474.46/585,199.77 = 222,072.22/x
  3. Step 3: Cross multiply
    390,474.46x = 585,199.77 × 222,072.22
  4. Step 4: Simplify right side
    390,474.46x = 129,956,612,067.39
  5. Step 5: Solve for x
    x = 129,956,612,067.39/390,474.46
  6. Step 6: Final answer
    x = 332,817.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.