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Finding the Fourth Proportional to 878,618,872.84, 1,212,512,568 and 482,138,394.32

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Solution

The fourth proportional to 878,618,872.84, 1,212,512,568 and 482,138,394.32 is: 665,361,148.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,618,872.84 : 1,212,512,568 = 482,138,394.32 : x
  2. Step 2: Convert to fraction form
    878,618,872.84/1,212,512,568 = 482,138,394.32/x
  3. Step 3: Cross multiply
    878,618,872.84x = 1,212,512,568 × 482,138,394.32
  4. Step 4: Simplify right side
    878,618,872.84x = 584,598,862,628,339,840
  5. Step 5: Solve for x
    x = 584,598,862,628,339,840/878,618,872.84
  6. Step 6: Final answer
    x = 665,361,148.84

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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.