Home / 378,872.09-522,842.41-209,105

Finding the Fourth Proportional to 378,872.09, 522,842.41 and 209,105

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Solution

The fourth proportional to 378,872.09, 522,842.41 and 209,105 is: 288,564.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,872.09 : 522,842.41 = 209,105 : x
  2. Step 2: Convert to fraction form
    378,872.09/522,842.41 = 209,105/x
  3. Step 3: Cross multiply
    378,872.09x = 522,842.41 × 209,105
  4. Step 4: Simplify right side
    378,872.09x = 109,328,962,143.05
  5. Step 5: Solve for x
    x = 109,328,962,143.05/378,872.09
  6. Step 6: Final answer
    x = 288,564.31

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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.