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Finding the Fourth Proportional to 262,857.40, 394,286.10 and 122,630.20

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Solution

The fourth proportional to 262,857.40, 394,286.10 and 122,630.20 is: 183,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,857.40 : 394,286.10 = 122,630.20 : x
  2. Step 2: Convert to fraction form
    262,857.40/394,286.10 = 122,630.20/x
  3. Step 3: Cross multiply
    262,857.40x = 394,286.10 × 122,630.20
  4. Step 4: Simplify right side
    262,857.40x = 48,351,383,300.22
  5. Step 5: Solve for x
    x = 48,351,383,300.22/262,857.40
  6. Step 6: Final answer
    x = 183,945.30

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.