Home / 378,991.28-523,046.50-217,853.12

Finding the Fourth Proportional to 378,991.28, 523,046.50 and 217,853.12

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Solution

The fourth proportional to 378,991.28, 523,046.50 and 217,853.12 is: 300,659.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,991.28 : 523,046.50 = 217,853.12 : x
  2. Step 2: Convert to fraction form
    378,991.28/523,046.50 = 217,853.12/x
  3. Step 3: Cross multiply
    378,991.28x = 523,046.50 × 217,853.12
  4. Step 4: Simplify right side
    378,991.28x = 113,947,311,930.08
  5. Step 5: Solve for x
    x = 113,947,311,930.08/378,991.28
  6. Step 6: Final answer
    x = 300,659.46

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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.