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Finding the Fourth Proportional to 644,610.20, 889,586.82 and 354,234.02

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Solution

The fourth proportional to 644,610.20, 889,586.82 and 354,234.02 is: 488,856.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,610.20 : 889,586.82 = 354,234.02 : x
  2. Step 2: Convert to fraction form
    644,610.20/889,586.82 = 354,234.02/x
  3. Step 3: Cross multiply
    644,610.20x = 889,586.82 × 354,234.02
  4. Step 4: Simplify right side
    644,610.20x = 315,121,910,939.68
  5. Step 5: Solve for x
    x = 315,121,910,939.68/644,610.20
  6. Step 6: Final answer
    x = 488,856.54

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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.