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Finding the Fourth Proportional to 482.21, 665.44 and 272.41

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Solution

The fourth proportional to 482.21, 665.44 and 272.41 is: 375.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.21 : 665.44 = 272.41 : x
  2. Step 2: Convert to fraction form
    482.21/665.44 = 272.41/x
  3. Step 3: Cross multiply
    482.21x = 665.44 × 272.41
  4. Step 4: Simplify right side
    482.21x = 181,267.82
  5. Step 5: Solve for x
    x = 181,267.82/482.21
  6. Step 6: Final answer
    x = 375.91

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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.