Home / 815,211.05-1,222,173.45-515,058.97

Finding the Fourth Proportional to 815,211.05, 1,222,173.45 and 515,058.97

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Solution

The fourth proportional to 815,211.05, 1,222,173.45 and 515,058.97 is: 772,182.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,211.05 : 1,222,173.45 = 515,058.97 : x
  2. Step 2: Convert to fraction form
    815,211.05/1,222,173.45 = 515,058.97/x
  3. Step 3: Cross multiply
    815,211.05x = 1,222,173.45 × 515,058.97
  4. Step 4: Simplify right side
    815,211.05x = 629,491,392,207.48
  5. Step 5: Solve for x
    x = 629,491,392,207.48/815,211.05
  6. Step 6: Final answer
    x = 772,182.12

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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.