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Finding the Fourth Proportional to 641,891.09, 885,823.62 and 351,515

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Solution

The fourth proportional to 641,891.09, 885,823.62 and 351,515 is: 485,098.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,891.09 : 885,823.62 = 351,515 : x
  2. Step 2: Convert to fraction form
    641,891.09/885,823.62 = 351,515/x
  3. Step 3: Cross multiply
    641,891.09x = 885,823.62 × 351,515
  4. Step 4: Simplify right side
    641,891.09x = 311,380,289,784.30
  5. Step 5: Solve for x
    x = 311,380,289,784.30/641,891.09
  6. Step 6: Final answer
    x = 485,098.32

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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.