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Finding the Fourth Proportional to 479, 660.86 and 380.44

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Solution

The fourth proportional to 479, 660.86 and 380.44 is: 524.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    479 : 660.86 = 380.44 : x
  2. Step 2: Convert to fraction form
    479/660.86 = 380.44/x
  3. Step 3: Cross multiply
    479x = 660.86 × 380.44
  4. Step 4: Simplify right side
    479x = 251,417.58
  5. Step 5: Solve for x
    x = 251,417.58/479
  6. Step 6: Final answer
    x = 524.88

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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.