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Finding the Fourth Proportional to 351,696.29, 485,286.05 and 208,433.21

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Solution

The fourth proportional to 351,696.29, 485,286.05 and 208,433.21 is: 287,605.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,696.29 : 485,286.05 = 208,433.21 : x
  2. Step 2: Convert to fraction form
    351,696.29/485,286.05 = 208,433.21/x
  3. Step 3: Cross multiply
    351,696.29x = 485,286.05 × 208,433.21
  4. Step 4: Simplify right side
    351,696.29x = 101,149,725,701.12
  5. Step 5: Solve for x
    x = 101,149,725,701.12/351,696.29
  6. Step 6: Final answer
    x = 287,605.33

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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.