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Finding the Fourth Proportional to 217,391.20, 326,086.80 and 122,912.80

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Solution

The fourth proportional to 217,391.20, 326,086.80 and 122,912.80 is: 184,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,391.20 : 326,086.80 = 122,912.80 : x
  2. Step 2: Convert to fraction form
    217,391.20/326,086.80 = 122,912.80/x
  3. Step 3: Cross multiply
    217,391.20x = 326,086.80 × 122,912.80
  4. Step 4: Simplify right side
    217,391.20x = 40,080,241,631.04
  5. Step 5: Solve for x
    x = 40,080,241,631.04/217,391.20
  6. Step 6: Final answer
    x = 184,369.20

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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.