Home / 378,734.91-522,665.11-208,979.97

Finding the Fourth Proportional to 378,734.91, 522,665.11 and 208,979.97

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Solution

The fourth proportional to 378,734.91, 522,665.11 and 208,979.97 is: 288,398.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,734.91 : 522,665.11 = 208,979.97 : x
  2. Step 2: Convert to fraction form
    378,734.91/522,665.11 = 208,979.97/x
  3. Step 3: Cross multiply
    378,734.91x = 522,665.11 × 208,979.97
  4. Step 4: Simplify right side
    378,734.91x = 109,226,536,133.57
  5. Step 5: Solve for x
    x = 109,226,536,133.57/378,734.91
  6. Step 6: Final answer
    x = 288,398.39

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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.