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Finding the Fourth Proportional to 481,889.20, 665,317.92 and 309,884.08

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Solution

The fourth proportional to 481,889.20, 665,317.92 and 309,884.08 is: 427,839.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,889.20 : 665,317.92 = 309,884.08 : x
  2. Step 2: Convert to fraction form
    481,889.20/665,317.92 = 309,884.08/x
  3. Step 3: Cross multiply
    481,889.20x = 665,317.92 × 309,884.08
  4. Step 4: Simplify right side
    481,889.20x = 206,171,431,546.71
  5. Step 5: Solve for x
    x = 206,171,431,546.71/481,889.20
  6. Step 6: Final answer
    x = 427,839.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.