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Finding the Fourth Proportional to 680,707,065.87, 939,377,696.51 and 394,654,183.20

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Solution

The fourth proportional to 680,707,065.87, 939,377,696.51 and 394,654,183.20 is: 544,623,900.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,707,065.87 : 939,377,696.51 = 394,654,183.20 : x
  2. Step 2: Convert to fraction form
    680,707,065.87/939,377,696.51 = 394,654,183.20/x
  3. Step 3: Cross multiply
    680,707,065.87x = 939,377,696.51 × 394,654,183.20
  4. Step 4: Simplify right side
    680,707,065.87x = 370,729,337,533,438,208
  5. Step 5: Solve for x
    x = 370,729,337,533,438,208/680,707,065.87
  6. Step 6: Final answer
    x = 544,623,900.83

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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.