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Finding the Fourth Proportional to 378,425.43, 522,493.89 and 242,808.75

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Solution

The fourth proportional to 378,425.43, 522,493.89 and 242,808.75 is: 335,247.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,425.43 : 522,493.89 = 242,808.75 : x
  2. Step 2: Convert to fraction form
    378,425.43/522,493.89 = 242,808.75/x
  3. Step 3: Cross multiply
    378,425.43x = 522,493.89 × 242,808.75
  4. Step 4: Simplify right side
    378,425.43x = 126,866,088,313.54
  5. Step 5: Solve for x
    x = 126,866,088,313.54/378,425.43
  6. Step 6: Final answer
    x = 335,247.26

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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.