Home / 642,644.70-886,849.77-356,183.28

Finding the Fourth Proportional to 642,644.70, 886,849.77 and 356,183.28

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Solution

The fourth proportional to 642,644.70, 886,849.77 and 356,183.28 is: 491,532.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,644.70 : 886,849.77 = 356,183.28 : x
  2. Step 2: Convert to fraction form
    642,644.70/886,849.77 = 356,183.28/x
  3. Step 3: Cross multiply
    642,644.70x = 886,849.77 × 356,183.28
  4. Step 4: Simplify right side
    642,644.70x = 315,881,059,945.85
  5. Step 5: Solve for x
    x = 315,881,059,945.85/642,644.70
  6. Step 6: Final answer
    x = 491,532.97

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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.