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Finding the Fourth Proportional to 378,188.58, 521,900.24 and 208,422.70

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Solution

The fourth proportional to 378,188.58, 521,900.24 and 208,422.70 is: 287,623.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,188.58 : 521,900.24 = 208,422.70 : x
  2. Step 2: Convert to fraction form
    378,188.58/521,900.24 = 208,422.70/x
  3. Step 3: Cross multiply
    378,188.58x = 521,900.24 × 208,422.70
  4. Step 4: Simplify right side
    378,188.58x = 108,775,857,151.45
  5. Step 5: Solve for x
    x = 108,775,857,151.45/378,188.58
  6. Step 6: Final answer
    x = 287,623.33

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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.