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Finding the Fourth Proportional to 281,912.82, 389,057.40 and 154,588.41

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Solution

The fourth proportional to 281,912.82, 389,057.40 and 154,588.41 is: 213,341.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,912.82 : 389,057.40 = 154,588.41 : x
  2. Step 2: Convert to fraction form
    281,912.82/389,057.40 = 154,588.41/x
  3. Step 3: Cross multiply
    281,912.82x = 389,057.40 × 154,588.41
  4. Step 4: Simplify right side
    281,912.82x = 60,143,764,864.73
  5. Step 5: Solve for x
    x = 60,143,764,864.73/281,912.82
  6. Step 6: Final answer
    x = 213,341.72

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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.