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Finding the Fourth Proportional to 378,786.27, 522,754.56 and 217,697.52

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Solution

The fourth proportional to 378,786.27, 522,754.56 and 217,697.52 is: 300,439.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,786.27 : 522,754.56 = 217,697.52 : x
  2. Step 2: Convert to fraction form
    378,786.27/522,754.56 = 217,697.52/x
  3. Step 3: Cross multiply
    378,786.27x = 522,754.56 × 217,697.52
  4. Step 4: Simplify right side
    378,786.27x = 113,802,371,280.69
  5. Step 5: Solve for x
    x = 113,802,371,280.69/378,786.27
  6. Step 6: Final answer
    x = 300,439.54

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1.5x scale

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.