Home / 378,400.20-522,196.36-206,316.76

Finding the Fourth Proportional to 378,400.20, 522,196.36 and 206,316.76

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Solution

The fourth proportional to 378,400.20, 522,196.36 and 206,316.76 is: 284,719.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,400.20 : 522,196.36 = 206,316.76 : x
  2. Step 2: Convert to fraction form
    378,400.20/522,196.36 = 206,316.76/x
  3. Step 3: Cross multiply
    378,400.20x = 522,196.36 × 206,316.76
  4. Step 4: Simplify right side
    378,400.20x = 107,737,861,078.99
  5. Step 5: Solve for x
    x = 107,737,861,078.99/378,400.20
  6. Step 6: Final answer
    x = 284,719.36

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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.