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Finding the Fourth Proportional to 400,980.02, 601,604.31 and 131,120.60

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Solution

The fourth proportional to 400,980.02, 601,604.31 and 131,120.60 is: 196,724.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,980.02 : 601,604.31 = 131,120.60 : x
  2. Step 2: Convert to fraction form
    400,980.02/601,604.31 = 131,120.60/x
  3. Step 3: Cross multiply
    400,980.02x = 601,604.31 × 131,120.60
  4. Step 4: Simplify right side
    400,980.02x = 78,882,719,102.09
  5. Step 5: Solve for x
    x = 78,882,719,102.09/400,980.02
  6. Step 6: Final answer
    x = 196,724.81

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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.