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Finding the Fourth Proportional to 351,578.46, 485,174.03 and 213,711.72

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Solution

The fourth proportional to 351,578.46, 485,174.03 and 213,711.72 is: 294,919.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,578.46 : 485,174.03 = 213,711.72 : x
  2. Step 2: Convert to fraction form
    351,578.46/485,174.03 = 213,711.72/x
  3. Step 3: Cross multiply
    351,578.46x = 485,174.03 × 213,711.72
  4. Step 4: Simplify right side
    351,578.46x = 103,687,375,382.07
  5. Step 5: Solve for x
    x = 103,687,375,382.07/351,578.46
  6. Step 6: Final answer
    x = 294,919.59

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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.