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Finding the Fourth Proportional to 655.64, 982.60 and 439.64

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Solution

The fourth proportional to 655.64, 982.60 and 439.64 is: 658.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.64 : 982.60 = 439.64 : x
  2. Step 2: Convert to fraction form
    655.64/982.60 = 439.64/x
  3. Step 3: Cross multiply
    655.64x = 982.60 × 439.64
  4. Step 4: Simplify right side
    655.64x = 431,990.26
  5. Step 5: Solve for x
    x = 431,990.26/655.64
  6. Step 6: Final answer
    x = 658.88

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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.