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Finding the Fourth Proportional to 339,863.40, 509,778.90 and 115,201.80

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Solution

The fourth proportional to 339,863.40, 509,778.90 and 115,201.80 is: 172,797.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,863.40 : 509,778.90 = 115,201.80 : x
  2. Step 2: Convert to fraction form
    339,863.40/509,778.90 = 115,201.80/x
  3. Step 3: Cross multiply
    339,863.40x = 509,778.90 × 115,201.80
  4. Step 4: Simplify right side
    339,863.40x = 58,727,446,882.02
  5. Step 5: Solve for x
    x = 58,727,446,882.02/339,863.40
  6. Step 6: Final answer
    x = 172,797.21

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1.5x scale

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.