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Finding the Fourth Proportional to 305,866.20, 422,081.06 and 169,908.90

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Solution

The fourth proportional to 305,866.20, 422,081.06 and 169,908.90 is: 234,466.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,866.20 : 422,081.06 = 169,908.90 : x
  2. Step 2: Convert to fraction form
    305,866.20/422,081.06 = 169,908.90/x
  3. Step 3: Cross multiply
    305,866.20x = 422,081.06 × 169,908.90
  4. Step 4: Simplify right side
    305,866.20x = 71,715,328,615.43
  5. Step 5: Solve for x
    x = 71,715,328,615.43/305,866.20
  6. Step 6: Final answer
    x = 234,466.34

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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.