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Finding the Fourth Proportional to 479.57, 660.47 and 445.55

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Solution

The fourth proportional to 479.57, 660.47 and 445.55 is: 613.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.57 : 660.47 = 445.55 : x
  2. Step 2: Convert to fraction form
    479.57/660.47 = 445.55/x
  3. Step 3: Cross multiply
    479.57x = 660.47 × 445.55
  4. Step 4: Simplify right side
    479.57x = 294,266.88
  5. Step 5: Solve for x
    x = 294,266.88/479.57
  6. Step 6: Final answer
    x = 613.61

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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.