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Finding the Fourth Proportional to 308,891.90, 426,265.38 and 171,067.97

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Solution

The fourth proportional to 308,891.90, 426,265.38 and 171,067.97 is: 236,070.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,891.90 : 426,265.38 = 171,067.97 : x
  2. Step 2: Convert to fraction form
    308,891.90/426,265.38 = 171,067.97/x
  3. Step 3: Cross multiply
    308,891.90x = 426,265.38 × 171,067.97
  4. Step 4: Simplify right side
    308,891.90x = 72,920,351,106.55
  5. Step 5: Solve for x
    x = 72,920,351,106.55/308,891.90
  6. Step 6: Final answer
    x = 236,070.78

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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.