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Finding the Fourth Proportional to 655.29, 905.18 and 481.55

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Solution

The fourth proportional to 655.29, 905.18 and 481.55 is: 665.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.29 : 905.18 = 481.55 : x
  2. Step 2: Convert to fraction form
    655.29/905.18 = 481.55/x
  3. Step 3: Cross multiply
    655.29x = 905.18 × 481.55
  4. Step 4: Simplify right side
    655.29x = 435,882.50
  5. Step 5: Solve for x
    x = 435,882.50/655.29
  6. Step 6: Final answer
    x = 665.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.