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Finding the Fourth Proportional to 654.70, 982.14 and 215.80

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Solution

The fourth proportional to 654.70, 982.14 and 215.80 is: 323.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.70 : 982.14 = 215.80 : x
  2. Step 2: Convert to fraction form
    654.70/982.14 = 215.80/x
  3. Step 3: Cross multiply
    654.70x = 982.14 × 215.80
  4. Step 4: Simplify right side
    654.70x = 211,945.81
  5. Step 5: Solve for x
    x = 211,945.81/654.70
  6. Step 6: Final answer
    x = 323.73

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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.