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Finding the Fourth Proportional to 378,512.58, 522,359.02 and 217,399.93

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Solution

The fourth proportional to 378,512.58, 522,359.02 and 217,399.93 is: 300,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,512.58 : 522,359.02 = 217,399.93 : x
  2. Step 2: Convert to fraction form
    378,512.58/522,359.02 = 217,399.93/x
  3. Step 3: Cross multiply
    378,512.58x = 522,359.02 × 217,399.93
  4. Step 4: Simplify right side
    378,512.58x = 113,560,814,382.87
  5. Step 5: Solve for x
    x = 113,560,814,382.87/378,512.58
  6. Step 6: Final answer
    x = 300,018.60

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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.