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Finding the Fourth Proportional to 611,964,879.66, 844,647,840.32 and 388,903,066.70

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Solution

The fourth proportional to 611,964,879.66, 844,647,840.32 and 388,903,066.70 is: 536,772,854.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,964,879.66 : 844,647,840.32 = 388,903,066.70 : x
  2. Step 2: Convert to fraction form
    611,964,879.66/844,647,840.32 = 388,903,066.70/x
  3. Step 3: Cross multiply
    611,964,879.66x = 844,647,840.32 × 388,903,066.70
  4. Step 4: Simplify right side
    611,964,879.66x = 328,486,135,375,812,160
  5. Step 5: Solve for x
    x = 328,486,135,375,812,160/611,964,879.66
  6. Step 6: Final answer
    x = 536,772,854.61

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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.