Home / 378,914.53-522,864.83-209,137.72

Finding the Fourth Proportional to 378,914.53, 522,864.83 and 209,137.72

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Solution

The fourth proportional to 378,914.53, 522,864.83 and 209,137.72 is: 288,589.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,914.53 : 522,864.83 = 209,137.72 : x
  2. Step 2: Convert to fraction form
    378,914.53/522,864.83 = 209,137.72/x
  3. Step 3: Cross multiply
    378,914.53x = 522,864.83 × 209,137.72
  4. Step 4: Simplify right side
    378,914.53x = 109,350,757,630.07
  5. Step 5: Solve for x
    x = 109,350,757,630.07/378,914.53
  6. Step 6: Final answer
    x = 288,589.51

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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.