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Finding the Fourth Proportional to 449,991.91, 621,045.96 and 256,469.18

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Solution

The fourth proportional to 449,991.91, 621,045.96 and 256,469.18 is: 353,960.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,991.91 : 621,045.96 = 256,469.18 : x
  2. Step 2: Convert to fraction form
    449,991.91/621,045.96 = 256,469.18/x
  3. Step 3: Cross multiply
    449,991.91x = 621,045.96 × 256,469.18
  4. Step 4: Simplify right side
    449,991.91x = 159,279,148,694.37
  5. Step 5: Solve for x
    x = 159,279,148,694.37/449,991.91
  6. Step 6: Final answer
    x = 353,960.03

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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.