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Finding the Fourth Proportional to 608.38, 912.49 and 218.36

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Solution

The fourth proportional to 608.38, 912.49 and 218.36 is: 327.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.38 : 912.49 = 218.36 : x
  2. Step 2: Convert to fraction form
    608.38/912.49 = 218.36/x
  3. Step 3: Cross multiply
    608.38x = 912.49 × 218.36
  4. Step 4: Simplify right side
    608.38x = 199,251.32
  5. Step 5: Solve for x
    x = 199,251.32/608.38
  6. Step 6: Final answer
    x = 327.51

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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.