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Finding the Fourth Proportional to 638,137, 880,634.84 and 351,667.36

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Solution

The fourth proportional to 638,137, 880,634.84 and 351,667.36 is: 485,304.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,137 : 880,634.84 = 351,667.36 : x
  2. Step 2: Convert to fraction form
    638,137/880,634.84 = 351,667.36/x
  3. Step 3: Cross multiply
    638,137x = 880,634.84 × 351,667.36
  4. Step 4: Simplify right side
    638,137x = 309,690,529,306.82
  5. Step 5: Solve for x
    x = 309,690,529,306.82/638,137
  6. Step 6: Final answer
    x = 485,304.14

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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.