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Finding the Fourth Proportional to 308,891.40, 426,264.69 and 171,067.47

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Solution

The fourth proportional to 308,891.40, 426,264.69 and 171,067.47 is: 236,070.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,891.40 : 426,264.69 = 171,067.47 : x
  2. Step 2: Convert to fraction form
    308,891.40/426,264.69 = 171,067.47/x
  3. Step 3: Cross multiply
    308,891.40x = 426,264.69 × 171,067.47
  4. Step 4: Simplify right side
    308,891.40x = 72,920,022,068.63
  5. Step 5: Solve for x
    x = 72,920,022,068.63/308,891.40
  6. Step 6: Final answer
    x = 236,070.09

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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.