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Finding the Fourth Proportional to 391,954,398.28, 587,968,222.38 and 115,605,881.80

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Solution

The fourth proportional to 391,954,398.28, 587,968,222.38 and 115,605,881.80 is: 173,419,625.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,954,398.28 : 587,968,222.38 = 115,605,881.80 : x
  2. Step 2: Convert to fraction form
    391,954,398.28/587,968,222.38 = 115,605,881.80/x
  3. Step 3: Cross multiply
    391,954,398.28x = 587,968,222.38 × 115,605,881.80
  4. Step 4: Simplify right side
    391,954,398.28x = 67,972,584,818,618,392
  5. Step 5: Solve for x
    x = 67,972,584,818,618,392/391,954,398.28
  6. Step 6: Final answer
    x = 173,419,625.13

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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.