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Finding the Fourth Proportional to 654.80, 982.24 and 380.68

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Solution

The fourth proportional to 654.80, 982.24 and 380.68 is: 571.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.80 : 982.24 = 380.68 : x
  2. Step 2: Convert to fraction form
    654.80/982.24 = 380.68/x
  3. Step 3: Cross multiply
    654.80x = 982.24 × 380.68
  4. Step 4: Simplify right side
    654.80x = 373,919.12
  5. Step 5: Solve for x
    x = 373,919.12/654.80
  6. Step 6: Final answer
    x = 571.04

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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.