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Finding the Fourth Proportional to 655, 982.50 and 270.25

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Solution

The fourth proportional to 655, 982.50 and 270.25 is: 405.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    655 : 982.50 = 270.25 : x
  2. Step 2: Convert to fraction form
    655/982.50 = 270.25/x
  3. Step 3: Cross multiply
    655x = 982.50 × 270.25
  4. Step 4: Simplify right side
    655x = 265,520.63
  5. Step 5: Solve for x
    x = 265,520.63/655
  6. Step 6: Final answer
    x = 405.38

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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.