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Finding the Fourth Proportional to 638,261.70, 880,796.79 and 351,781.98

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Solution

The fourth proportional to 638,261.70, 880,796.79 and 351,781.98 is: 485,456.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,261.70 : 880,796.79 = 351,781.98 : x
  2. Step 2: Convert to fraction form
    638,261.70/880,796.79 = 351,781.98/x
  3. Step 3: Cross multiply
    638,261.70x = 880,796.79 × 351,781.98
  4. Step 4: Simplify right side
    638,261.70x = 309,848,438,763.84
  5. Step 5: Solve for x
    x = 309,848,438,763.84/638,261.70
  6. Step 6: Final answer
    x = 485,456.73

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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.