Home / 815,011.97-1,222,517.88-309,571.70

Finding the Fourth Proportional to 815,011.97, 1,222,517.88 and 309,571.70

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Solution

The fourth proportional to 815,011.97, 1,222,517.88 and 309,571.70 is: 464,357.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,011.97 : 1,222,517.88 = 309,571.70 : x
  2. Step 2: Convert to fraction form
    815,011.97/1,222,517.88 = 309,571.70/x
  3. Step 3: Cross multiply
    815,011.97x = 1,222,517.88 × 309,571.70
  4. Step 4: Simplify right side
    815,011.97x = 378,456,932,279.41
  5. Step 5: Solve for x
    x = 378,456,932,279.41/815,011.97
  6. Step 6: Final answer
    x = 464,357.52

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.