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Finding the Fourth Proportional to 351,786.69, 485,474.85 and 215,895.96

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Solution

The fourth proportional to 351,786.69, 485,474.85 and 215,895.96 is: 297,942.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,786.69 : 485,474.85 = 215,895.96 : x
  2. Step 2: Convert to fraction form
    351,786.69/485,474.85 = 215,895.96/x
  3. Step 3: Cross multiply
    351,786.69x = 485,474.85 × 215,895.96
  4. Step 4: Simplify right side
    351,786.69x = 104,812,058,796.61
  5. Step 5: Solve for x
    x = 104,812,058,796.61/351,786.69
  6. Step 6: Final answer
    x = 297,942.08

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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.