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Finding the Fourth Proportional to 305,910.20, 422,155.70 and 169,956.70

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Solution

The fourth proportional to 305,910.20, 422,155.70 and 169,956.70 is: 234,540.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,910.20 : 422,155.70 = 169,956.70 : x
  2. Step 2: Convert to fraction form
    305,910.20/422,155.70 = 169,956.70/x
  3. Step 3: Cross multiply
    305,910.20x = 422,155.70 × 169,956.70
  4. Step 4: Simplify right side
    305,910.20x = 71,748,188,390.35
  5. Step 5: Solve for x
    x = 71,748,188,390.35/305,910.20
  6. Step 6: Final answer
    x = 234,540.03

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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.