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Finding the Fourth Proportional to 486.30, 727.56 and 445.44

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Solution

The fourth proportional to 486.30, 727.56 and 445.44 is: 666.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.30 : 727.56 = 445.44 : x
  2. Step 2: Convert to fraction form
    486.30/727.56 = 445.44/x
  3. Step 3: Cross multiply
    486.30x = 727.56 × 445.44
  4. Step 4: Simplify right side
    486.30x = 324,084.33
  5. Step 5: Solve for x
    x = 324,084.33/486.30
  6. Step 6: Final answer
    x = 666.43

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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.