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Finding the Fourth Proportional to 654.63, 982.35 and 380.85

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Solution

The fourth proportional to 654.63, 982.35 and 380.85 is: 571.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.63 : 982.35 = 380.85 : x
  2. Step 2: Convert to fraction form
    654.63/982.35 = 380.85/x
  3. Step 3: Cross multiply
    654.63x = 982.35 × 380.85
  4. Step 4: Simplify right side
    654.63x = 374,128.00
  5. Step 5: Solve for x
    x = 374,128.00/654.63
  6. Step 6: Final answer
    x = 571.51

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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.