Home / 378,945.70-522,945.17-209,179.83

Finding the Fourth Proportional to 378,945.70, 522,945.17 and 209,179.83

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Solution

The fourth proportional to 378,945.70, 522,945.17 and 209,179.83 is: 288,668.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,945.70 : 522,945.17 = 209,179.83 : x
  2. Step 2: Convert to fraction form
    378,945.70/522,945.17 = 209,179.83/x
  3. Step 3: Cross multiply
    378,945.70x = 522,945.17 × 209,179.83
  4. Step 4: Simplify right side
    378,945.70x = 109,389,581,759.92
  5. Step 5: Solve for x
    x = 109,389,581,759.92/378,945.70
  6. Step 6: Final answer
    x = 288,668.22

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1.5x scale

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.