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Finding the Fourth Proportional to 706,446,847.38, 974,879,443.56 and 388,904,512.44

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Solution

The fourth proportional to 706,446,847.38, 974,879,443.56 and 388,904,512.44 is: 536,678,755.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,446,847.38 : 974,879,443.56 = 388,904,512.44 : x
  2. Step 2: Convert to fraction form
    706,446,847.38/974,879,443.56 = 388,904,512.44/x
  3. Step 3: Cross multiply
    706,446,847.38x = 974,879,443.56 × 388,904,512.44
  4. Step 4: Simplify right side
    706,446,847.38x = 379,135,014,685,480,256
  5. Step 5: Solve for x
    x = 379,135,014,685,480,256/706,446,847.38
  6. Step 6: Final answer
    x = 536,678,755.23

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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.