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Finding the Fourth Proportional to 339,944.20, 509,989.20 and 103,310.80

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Solution

The fourth proportional to 339,944.20, 509,989.20 and 103,310.80 is: 154,988.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,944.20 : 509,989.20 = 103,310.80 : x
  2. Step 2: Convert to fraction form
    339,944.20/509,989.20 = 103,310.80/x
  3. Step 3: Cross multiply
    339,944.20x = 509,989.20 × 103,310.80
  4. Step 4: Simplify right side
    339,944.20x = 52,687,392,243.36
  5. Step 5: Solve for x
    x = 52,687,392,243.36/339,944.20
  6. Step 6: Final answer
    x = 154,988.35

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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.