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Finding the Fourth Proportional to 283,422.97, 391,151.33 and 211,678.44

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Solution

The fourth proportional to 283,422.97, 391,151.33 and 211,678.44 is: 292,136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,422.97 : 391,151.33 = 211,678.44 : x
  2. Step 2: Convert to fraction form
    283,422.97/391,151.33 = 211,678.44/x
  3. Step 3: Cross multiply
    283,422.97x = 391,151.33 × 211,678.44
  4. Step 4: Simplify right side
    283,422.97x = 82,798,303,338.33
  5. Step 5: Solve for x
    x = 82,798,303,338.33/283,422.97
  6. Step 6: Final answer
    x = 292,136.88

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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.