Home / 378,872.22-522,842.58-209,105.13

Finding the Fourth Proportional to 378,872.22, 522,842.58 and 209,105.13

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Solution

The fourth proportional to 378,872.22, 522,842.58 and 209,105.13 is: 288,564.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,872.22 : 522,842.58 = 209,105.13 : x
  2. Step 2: Convert to fraction form
    378,872.22/522,842.58 = 209,105.13/x
  3. Step 3: Cross multiply
    378,872.22x = 522,842.58 × 209,105.13
  4. Step 4: Simplify right side
    378,872.22x = 109,329,065,660.44
  5. Step 5: Solve for x
    x = 109,329,065,660.44/378,872.22
  6. Step 6: Final answer
    x = 288,564.48

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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.