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Finding the Fourth Proportional to 641,713.33, 885,564.66 and 351,343.72

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Solution

The fourth proportional to 641,713.33, 885,564.66 and 351,343.72 is: 484,854.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,713.33 : 885,564.66 = 351,343.72 : x
  2. Step 2: Convert to fraction form
    641,713.33/885,564.66 = 351,343.72/x
  3. Step 3: Cross multiply
    641,713.33x = 885,564.66 × 351,343.72
  4. Step 4: Simplify right side
    641,713.33x = 311,137,581,944.94
  5. Step 5: Solve for x
    x = 311,137,581,944.94/641,713.33
  6. Step 6: Final answer
    x = 484,854.48

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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.