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Finding the Fourth Proportional to 654.18, 980.66 and 329.16

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Solution

The fourth proportional to 654.18, 980.66 and 329.16 is: 493.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.18 : 980.66 = 329.16 : x
  2. Step 2: Convert to fraction form
    654.18/980.66 = 329.16/x
  3. Step 3: Cross multiply
    654.18x = 980.66 × 329.16
  4. Step 4: Simplify right side
    654.18x = 322,796.69
  5. Step 5: Solve for x
    x = 322,796.69/654.18
  6. Step 6: Final answer
    x = 493.44

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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.