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Finding the Fourth Proportional to 681,191, 940,072.76 and 379,385

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Solution

The fourth proportional to 681,191, 940,072.76 and 379,385 is: 523,567.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,191 : 940,072.76 = 379,385 : x
  2. Step 2: Convert to fraction form
    681,191/940,072.76 = 379,385/x
  3. Step 3: Cross multiply
    681,191x = 940,072.76 × 379,385
  4. Step 4: Simplify right side
    681,191x = 356,649,504,052.60
  5. Step 5: Solve for x
    x = 356,649,504,052.60/681,191
  6. Step 6: Final answer
    x = 523,567.55

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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.