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Finding the Fourth Proportional to 225,679.81, 339,048.67 and 212,912.49

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Solution

The fourth proportional to 225,679.81, 339,048.67 and 212,912.49 is: 319,867.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,679.81 : 339,048.67 = 212,912.49 : x
  2. Step 2: Convert to fraction form
    225,679.81/339,048.67 = 212,912.49/x
  3. Step 3: Cross multiply
    225,679.81x = 339,048.67 × 212,912.49
  4. Step 4: Simplify right side
    225,679.81x = 72,187,696,560.89
  5. Step 5: Solve for x
    x = 72,187,696,560.89/225,679.81
  6. Step 6: Final answer
    x = 319,867.77

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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.