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Finding the Fourth Proportional to 412.96, 619.17 and 217.76

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Solution

The fourth proportional to 412.96, 619.17 and 217.76 is: 326.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.96 : 619.17 = 217.76 : x
  2. Step 2: Convert to fraction form
    412.96/619.17 = 217.76/x
  3. Step 3: Cross multiply
    412.96x = 619.17 × 217.76
  4. Step 4: Simplify right side
    412.96x = 134,827.57
  5. Step 5: Solve for x
    x = 134,827.57/412.96
  6. Step 6: Final answer
    x = 326.49

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Double scale
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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.