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Finding the Fourth Proportional to 680,892.75, 939,661.16 and 379,086.75

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Solution

The fourth proportional to 680,892.75, 939,661.16 and 379,086.75 is: 523,155.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,892.75 : 939,661.16 = 379,086.75 : x
  2. Step 2: Convert to fraction form
    680,892.75/939,661.16 = 379,086.75/x
  3. Step 3: Cross multiply
    680,892.75x = 939,661.16 × 379,086.75
  4. Step 4: Simplify right side
    680,892.75x = 356,213,093,350.20
  5. Step 5: Solve for x
    x = 356,213,093,350.20/680,892.75
  6. Step 6: Final answer
    x = 523,155.95

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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.