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Finding the Fourth Proportional to 339,371.80, 509,057.70 and 173,138.20

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Solution

The fourth proportional to 339,371.80, 509,057.70 and 173,138.20 is: 259,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,371.80 : 509,057.70 = 173,138.20 : x
  2. Step 2: Convert to fraction form
    339,371.80/509,057.70 = 173,138.20/x
  3. Step 3: Cross multiply
    339,371.80x = 509,057.70 × 173,138.20
  4. Step 4: Simplify right side
    339,371.80x = 88,137,333,874.14
  5. Step 5: Solve for x
    x = 88,137,333,874.14/339,371.80
  6. Step 6: Final answer
    x = 259,707.30

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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.