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Finding the Fourth Proportional to 641,892.72, 885,825.82 and 351,516.54

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Solution

The fourth proportional to 641,892.72, 885,825.82 and 351,516.54 is: 485,100.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,892.72 : 885,825.82 = 351,516.54 : x
  2. Step 2: Convert to fraction form
    641,892.72/885,825.82 = 351,516.54/x
  3. Step 3: Cross multiply
    641,892.72x = 885,825.82 × 351,516.54
  4. Step 4: Simplify right side
    641,892.72x = 311,382,427,289.06
  5. Step 5: Solve for x
    x = 311,382,427,289.06/641,892.72
  6. Step 6: Final answer
    x = 485,100.42

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1.5x scale

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.