Home / 378,982.27-522,992.32-209,212.75

Finding the Fourth Proportional to 378,982.27, 522,992.32 and 209,212.75

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Solution

The fourth proportional to 378,982.27, 522,992.32 and 209,212.75 is: 288,711.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,982.27 : 522,992.32 = 209,212.75 : x
  2. Step 2: Convert to fraction form
    378,982.27/522,992.32 = 209,212.75/x
  3. Step 3: Cross multiply
    378,982.27x = 522,992.32 × 209,212.75
  4. Step 4: Simplify right side
    378,982.27x = 109,416,661,496.08
  5. Step 5: Solve for x
    x = 109,416,661,496.08/378,982.27
  6. Step 6: Final answer
    x = 288,711.82

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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.