Home / 378,865.92-522,819.20-209,097.60

Finding the Fourth Proportional to 378,865.92, 522,819.20 and 209,097.60

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Solution

The fourth proportional to 378,865.92, 522,819.20 and 209,097.60 is: 288,545.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,865.92 : 522,819.20 = 209,097.60 : x
  2. Step 2: Convert to fraction form
    378,865.92/522,819.20 = 209,097.60/x
  3. Step 3: Cross multiply
    378,865.92x = 522,819.20 × 209,097.60
  4. Step 4: Simplify right side
    378,865.92x = 109,320,239,953.92
  5. Step 5: Solve for x
    x = 109,320,239,953.92/378,865.92
  6. Step 6: Final answer
    x = 288,545.98

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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.