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Finding the Fourth Proportional to 306,245.30, 422,618.90 and 170,277.78

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Solution

The fourth proportional to 306,245.30, 422,618.90 and 170,277.78 is: 234,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,245.30 : 422,618.90 = 170,277.78 : x
  2. Step 2: Convert to fraction form
    306,245.30/422,618.90 = 170,277.78/x
  3. Step 3: Cross multiply
    306,245.30x = 422,618.90 × 170,277.78
  4. Step 4: Simplify right side
    306,245.30x = 71,962,607,226.65
  5. Step 5: Solve for x
    x = 71,962,607,226.65/306,245.30
  6. Step 6: Final answer
    x = 234,983.55

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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.