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Finding the Fourth Proportional to 655.56, 982.80 and 330.76

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Solution

The fourth proportional to 655.56, 982.80 and 330.76 is: 495.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.56 : 982.80 = 330.76 : x
  2. Step 2: Convert to fraction form
    655.56/982.80 = 330.76/x
  3. Step 3: Cross multiply
    655.56x = 982.80 × 330.76
  4. Step 4: Simplify right side
    655.56x = 325,070.93
  5. Step 5: Solve for x
    x = 325,070.93/655.56
  6. Step 6: Final answer
    x = 495.87

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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.