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Finding the Fourth Proportional to 376,686, 519,872.76 and 217,710

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Solution

The fourth proportional to 376,686, 519,872.76 and 217,710 is: 300,466.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,686 : 519,872.76 = 217,710 : x
  2. Step 2: Convert to fraction form
    376,686/519,872.76 = 217,710/x
  3. Step 3: Cross multiply
    376,686x = 519,872.76 × 217,710
  4. Step 4: Simplify right side
    376,686x = 113,181,498,579.60
  5. Step 5: Solve for x
    x = 113,181,498,579.60/376,686
  6. Step 6: Final answer
    x = 300,466.43

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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.