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Finding the Fourth Proportional to 306,149.70, 422,555.10 and 170,231.34

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Solution

The fourth proportional to 306,149.70, 422,555.10 and 170,231.34 is: 234,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,149.70 : 422,555.10 = 170,231.34 : x
  2. Step 2: Convert to fraction form
    306,149.70/422,555.10 = 170,231.34/x
  3. Step 3: Cross multiply
    306,149.70x = 422,555.10 × 170,231.34
  4. Step 4: Simplify right side
    306,149.70x = 71,932,120,896.83
  5. Step 5: Solve for x
    x = 71,932,120,896.83/306,149.70
  6. Step 6: Final answer
    x = 234,957.35

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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.