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Finding the Fourth Proportional to 655.40, 983.82 and 330.68

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Solution

The fourth proportional to 655.40, 983.82 and 330.68 is: 496.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.40 : 983.82 = 330.68 : x
  2. Step 2: Convert to fraction form
    655.40/983.82 = 330.68/x
  3. Step 3: Cross multiply
    655.40x = 983.82 × 330.68
  4. Step 4: Simplify right side
    655.40x = 325,329.60
  5. Step 5: Solve for x
    x = 325,329.60/655.40
  6. Step 6: Final answer
    x = 496.38

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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.