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Finding the Fourth Proportional to 308,878.73, 426,249.39 and 172,913.79

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Solution

The fourth proportional to 308,878.73, 426,249.39 and 172,913.79 is: 238,619.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,878.73 : 426,249.39 = 172,913.79 : x
  2. Step 2: Convert to fraction form
    308,878.73/426,249.39 = 172,913.79/x
  3. Step 3: Cross multiply
    308,878.73x = 426,249.39 × 172,913.79
  4. Step 4: Simplify right side
    308,878.73x = 73,704,397,394.47
  5. Step 5: Solve for x
    x = 73,704,397,394.47/308,878.73
  6. Step 6: Final answer
    x = 238,619.21

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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.