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Finding the Fourth Proportional to 681,108, 939,928.80 and 394,794.08

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Solution

The fourth proportional to 681,108, 939,928.80 and 394,794.08 is: 544,815.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,108 : 939,928.80 = 394,794.08 : x
  2. Step 2: Convert to fraction form
    681,108/939,928.80 = 394,794.08/x
  3. Step 3: Cross multiply
    681,108x = 939,928.80 × 394,794.08
  4. Step 4: Simplify right side
    681,108x = 371,078,325,861.50
  5. Step 5: Solve for x
    x = 371,078,325,861.50/681,108
  6. Step 6: Final answer
    x = 544,815.69

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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.