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Finding the Fourth Proportional to 339,609.10, 509,431.07 and 86,891.73

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Solution

The fourth proportional to 339,609.10, 509,431.07 and 86,891.73 is: 130,342.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,609.10 : 509,431.07 = 86,891.73 : x
  2. Step 2: Convert to fraction form
    339,609.10/509,431.07 = 86,891.73/x
  3. Step 3: Cross multiply
    339,609.10x = 509,431.07 × 86,891.73
  4. Step 4: Simplify right side
    339,609.10x = 44,265,346,553.59
  5. Step 5: Solve for x
    x = 44,265,346,553.59/339,609.10
  6. Step 6: Final answer
    x = 130,342.05

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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.