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Finding the Fourth Proportional to 484,991.20, 727,486.80 and 449,999.20

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Solution

The fourth proportional to 484,991.20, 727,486.80 and 449,999.20 is: 674,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,991.20 : 727,486.80 = 449,999.20 : x
  2. Step 2: Convert to fraction form
    484,991.20/727,486.80 = 449,999.20/x
  3. Step 3: Cross multiply
    484,991.20x = 727,486.80 × 449,999.20
  4. Step 4: Simplify right side
    484,991.20x = 327,368,478,010.56
  5. Step 5: Solve for x
    x = 327,368,478,010.56/484,991.20
  6. Step 6: Final answer
    x = 674,998.80

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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.