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Finding the Fourth Proportional to 607.55, 911.48 and 217.64

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Solution

The fourth proportional to 607.55, 911.48 and 217.64 is: 326.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.55 : 911.48 = 217.64 : x
  2. Step 2: Convert to fraction form
    607.55/911.48 = 217.64/x
  3. Step 3: Cross multiply
    607.55x = 911.48 × 217.64
  4. Step 4: Simplify right side
    607.55x = 198,368.86
  5. Step 5: Solve for x
    x = 198,368.86/607.55
  6. Step 6: Final answer
    x = 326.51

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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.