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Finding the Fourth Proportional to 654.55, 982.44 and 639.57

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Solution

The fourth proportional to 654.55, 982.44 and 639.57 is: 959.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.55 : 982.44 = 639.57 : x
  2. Step 2: Convert to fraction form
    654.55/982.44 = 639.57/x
  3. Step 3: Cross multiply
    654.55x = 982.44 × 639.57
  4. Step 4: Simplify right side
    654.55x = 628,339.15
  5. Step 5: Solve for x
    x = 628,339.15/654.55
  6. Step 6: Final answer
    x = 959.96

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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.