Home / 378,052.70-521,736.27-208,286.78

Finding the Fourth Proportional to 378,052.70, 521,736.27 and 208,286.78

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Solution

The fourth proportional to 378,052.70, 521,736.27 and 208,286.78 is: 287,448.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,052.70 : 521,736.27 = 208,286.78 : x
  2. Step 2: Convert to fraction form
    378,052.70/521,736.27 = 208,286.78/x
  3. Step 3: Cross multiply
    378,052.70x = 521,736.27 × 208,286.78
  4. Step 4: Simplify right side
    378,052.70x = 108,670,767,687.51
  5. Step 5: Solve for x
    x = 108,670,767,687.51/378,052.70
  6. Step 6: Final answer
    x = 287,448.73

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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.