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Finding the Fourth Proportional to 666,598,777.39, 919,906,233.99 and 398,674,568.52

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Solution

The fourth proportional to 666,598,777.39, 919,906,233.99 and 398,674,568.52 is: 550,170,857.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,598,777.39 : 919,906,233.99 = 398,674,568.52 : x
  2. Step 2: Convert to fraction form
    666,598,777.39/919,906,233.99 = 398,674,568.52/x
  3. Step 3: Cross multiply
    666,598,777.39x = 919,906,233.99 × 398,674,568.52
  4. Step 4: Simplify right side
    666,598,777.39x = 366,743,220,914,821,376
  5. Step 5: Solve for x
    x = 366,743,220,914,821,376/666,598,777.39
  6. Step 6: Final answer
    x = 550,170,857.42

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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.