Home / 378,972.40-522,991.43-215,619.91

Finding the Fourth Proportional to 378,972.40, 522,991.43 and 215,619.91

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Solution

The fourth proportional to 378,972.40, 522,991.43 and 215,619.91 is: 297,560.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,972.40 : 522,991.43 = 215,619.91 : x
  2. Step 2: Convert to fraction form
    378,972.40/522,991.43 = 215,619.91/x
  3. Step 3: Cross multiply
    378,972.40x = 522,991.43 × 215,619.91
  4. Step 4: Simplify right side
    378,972.40x = 112,767,365,067.37
  5. Step 5: Solve for x
    x = 112,767,365,067.37/378,972.40
  6. Step 6: Final answer
    x = 297,560.89

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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.