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Finding the Fourth Proportional to 339,340.20, 509,156.10 and 173,128.20

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Solution

The fourth proportional to 339,340.20, 509,156.10 and 173,128.20 is: 259,766.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,340.20 : 509,156.10 = 173,128.20 : x
  2. Step 2: Convert to fraction form
    339,340.20/509,156.10 = 173,128.20/x
  3. Step 3: Cross multiply
    339,340.20x = 509,156.10 × 173,128.20
  4. Step 4: Simplify right side
    339,340.20x = 88,149,279,112.02
  5. Step 5: Solve for x
    x = 88,149,279,112.02/339,340.20
  6. Step 6: Final answer
    x = 259,766.69

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Double scale
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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.