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Finding the Fourth Proportional to 641,717.61, 885,580.78 and 351,324.31

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Solution

The fourth proportional to 641,717.61, 885,580.78 and 351,324.31 is: 484,833.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,717.61 : 885,580.78 = 351,324.31 : x
  2. Step 2: Convert to fraction form
    641,717.61/885,580.78 = 351,324.31/x
  3. Step 3: Cross multiply
    641,717.61x = 885,580.78 × 351,324.31
  4. Step 4: Simplify right side
    641,717.61x = 311,126,059,838.75
  5. Step 5: Solve for x
    x = 311,126,059,838.75/641,717.61
  6. Step 6: Final answer
    x = 484,833.29

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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.