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Finding the Fourth Proportional to 641,891.72, 885,824.44 and 351,515.54

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Solution

The fourth proportional to 641,891.72, 885,824.44 and 351,515.54 is: 485,099.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,891.72 : 885,824.44 = 351,515.54 : x
  2. Step 2: Convert to fraction form
    641,891.72/885,824.44 = 351,515.54/x
  3. Step 3: Cross multiply
    641,891.72x = 885,824.44 × 351,515.54
  4. Step 4: Simplify right side
    641,891.72x = 311,381,051,063.89
  5. Step 5: Solve for x
    x = 311,381,051,063.89/641,891.72
  6. Step 6: Final answer
    x = 485,099.03

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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.