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Finding the Fourth Proportional to 327,152.80, 490,729.20 and 105,536.80

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Solution

The fourth proportional to 327,152.80, 490,729.20 and 105,536.80 is: 158,305.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,152.80 : 490,729.20 = 105,536.80 : x
  2. Step 2: Convert to fraction form
    327,152.80/490,729.20 = 105,536.80/x
  3. Step 3: Cross multiply
    327,152.80x = 490,729.20 × 105,536.80
  4. Step 4: Simplify right side
    327,152.80x = 51,789,989,434.56
  5. Step 5: Solve for x
    x = 51,789,989,434.56/327,152.80
  6. Step 6: Final answer
    x = 158,305.20

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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.