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Finding the Fourth Proportional to 720,777,901.62, 994,747,640.49 and 438,540,379.38

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Solution

The fourth proportional to 720,777,901.62, 994,747,640.49 and 438,540,379.38 is: 605,230,830.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,777,901.62 : 994,747,640.49 = 438,540,379.38 : x
  2. Step 2: Convert to fraction form
    720,777,901.62/994,747,640.49 = 438,540,379.38/x
  3. Step 3: Cross multiply
    720,777,901.62x = 994,747,640.49 × 438,540,379.38
  4. Step 4: Simplify right side
    720,777,901.62x = 436,237,007,647,844,480
  5. Step 5: Solve for x
    x = 436,237,007,647,844,480/720,777,901.62
  6. Step 6: Final answer
    x = 605,230,830.01

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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.