Home / 378,361.28-522,138.40-217,226.72

Finding the Fourth Proportional to 378,361.28, 522,138.40 and 217,226.72

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Solution

The fourth proportional to 378,361.28, 522,138.40 and 217,226.72 is: 299,772.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,361.28 : 522,138.40 = 217,226.72 : x
  2. Step 2: Convert to fraction form
    378,361.28/522,138.40 = 217,226.72/x
  3. Step 3: Cross multiply
    378,361.28x = 522,138.40 × 217,226.72
  4. Step 4: Simplify right side
    378,361.28x = 113,422,412,018.05
  5. Step 5: Solve for x
    x = 113,422,412,018.05/378,361.28
  6. Step 6: Final answer
    x = 299,772.78

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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.