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Finding the Fourth Proportional to 638,185.89, 880,702.56 and 351,716.43

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Solution

The fourth proportional to 638,185.89, 880,702.56 and 351,716.43 is: 485,372.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,185.89 : 880,702.56 = 351,716.43 : x
  2. Step 2: Convert to fraction form
    638,185.89/880,702.56 = 351,716.43/x
  3. Step 3: Cross multiply
    638,185.89x = 880,702.56 × 351,716.43
  4. Step 4: Simplify right side
    638,185.89x = 309,757,560,295.06
  5. Step 5: Solve for x
    x = 309,757,560,295.06/638,185.89
  6. Step 6: Final answer
    x = 485,372.00

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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.