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Finding the Fourth Proportional to 655.56, 983.88 and 331.02

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Solution

The fourth proportional to 655.56, 983.88 and 331.02 is: 496.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.56 : 983.88 = 331.02 : x
  2. Step 2: Convert to fraction form
    655.56/983.88 = 331.02/x
  3. Step 3: Cross multiply
    655.56x = 983.88 × 331.02
  4. Step 4: Simplify right side
    655.56x = 325,683.96
  5. Step 5: Solve for x
    x = 325,683.96/655.56
  6. Step 6: Final answer
    x = 496.80

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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.