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Finding the Fourth Proportional to 655.28, 982.31 and 290.47

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Solution

The fourth proportional to 655.28, 982.31 and 290.47 is: 435.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.28 : 982.31 = 290.47 : x
  2. Step 2: Convert to fraction form
    655.28/982.31 = 290.47/x
  3. Step 3: Cross multiply
    655.28x = 982.31 × 290.47
  4. Step 4: Simplify right side
    655.28x = 285,331.59
  5. Step 5: Solve for x
    x = 285,331.59/655.28
  6. Step 6: Final answer
    x = 435.43

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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.