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Finding the Fourth Proportional to 311,046.78, 429,245.19 and 176,910.78

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Solution

The fourth proportional to 311,046.78, 429,245.19 and 176,910.78 is: 244,137.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,046.78 : 429,245.19 = 176,910.78 : x
  2. Step 2: Convert to fraction form
    311,046.78/429,245.19 = 176,910.78/x
  3. Step 3: Cross multiply
    311,046.78x = 429,245.19 × 176,910.78
  4. Step 4: Simplify right side
    311,046.78x = 75,938,101,374.15
  5. Step 5: Solve for x
    x = 75,938,101,374.15/311,046.78
  6. Step 6: Final answer
    x = 244,137.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.