Home / 639,286.84-959,086.26-212,821.96

Finding the Fourth Proportional to 639,286.84, 959,086.26 and 212,821.96

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Solution

The fourth proportional to 639,286.84, 959,086.26 and 212,821.96 is: 319,284.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,286.84 : 959,086.26 = 212,821.96 : x
  2. Step 2: Convert to fraction form
    639,286.84/959,086.26 = 212,821.96/x
  3. Step 3: Cross multiply
    639,286.84x = 959,086.26 × 212,821.96
  4. Step 4: Simplify right side
    639,286.84x = 204,114,617,662.27
  5. Step 5: Solve for x
    x = 204,114,617,662.27/639,286.84
  6. Step 6: Final answer
    x = 319,284.87

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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.