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Finding the Fourth Proportional to 299,430.80, 449,146.20 and 269,906.30

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Solution

The fourth proportional to 299,430.80, 449,146.20 and 269,906.30 is: 404,859.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,430.80 : 449,146.20 = 269,906.30 : x
  2. Step 2: Convert to fraction form
    299,430.80/449,146.20 = 269,906.30/x
  3. Step 3: Cross multiply
    299,430.80x = 449,146.20 × 269,906.30
  4. Step 4: Simplify right side
    299,430.80x = 121,227,389,001.06
  5. Step 5: Solve for x
    x = 121,227,389,001.06/299,430.80
  6. Step 6: Final answer
    x = 404,859.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.