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Finding the Fourth Proportional to 655.46, 983.68 and 330.64

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Solution

The fourth proportional to 655.46, 983.68 and 330.64 is: 496.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.46 : 983.68 = 330.64 : x
  2. Step 2: Convert to fraction form
    655.46/983.68 = 330.64/x
  3. Step 3: Cross multiply
    655.46x = 983.68 × 330.64
  4. Step 4: Simplify right side
    655.46x = 325,243.96
  5. Step 5: Solve for x
    x = 325,243.96/655.46
  6. Step 6: Final answer
    x = 496.21

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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.