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Finding the Fourth Proportional to 327,135.80, 490,339.20 and 127,389.80

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Solution

The fourth proportional to 327,135.80, 490,339.20 and 127,389.80 is: 190,942.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,135.80 : 490,339.20 = 127,389.80 : x
  2. Step 2: Convert to fraction form
    327,135.80/490,339.20 = 127,389.80/x
  3. Step 3: Cross multiply
    327,135.80x = 490,339.20 × 127,389.80
  4. Step 4: Simplify right side
    327,135.80x = 62,464,212,620.16
  5. Step 5: Solve for x
    x = 62,464,212,620.16/327,135.80
  6. Step 6: Final answer
    x = 190,942.76

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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.