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Finding the Fourth Proportional to 607.76, 911.53 and 217.68

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Solution

The fourth proportional to 607.76, 911.53 and 217.68 is: 326.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.76 : 911.53 = 217.68 : x
  2. Step 2: Convert to fraction form
    607.76/911.53 = 217.68/x
  3. Step 3: Cross multiply
    607.76x = 911.53 × 217.68
  4. Step 4: Simplify right side
    607.76x = 198,421.85
  5. Step 5: Solve for x
    x = 198,421.85/607.76
  6. Step 6: Final answer
    x = 326.48

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Similar ratio
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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.