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Finding the Fourth Proportional to 482.61, 665.97 and 272.78

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Solution

The fourth proportional to 482.61, 665.97 and 272.78 is: 376.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.61 : 665.97 = 272.78 : x
  2. Step 2: Convert to fraction form
    482.61/665.97 = 272.78/x
  3. Step 3: Cross multiply
    482.61x = 665.97 × 272.78
  4. Step 4: Simplify right side
    482.61x = 181,663.30
  5. Step 5: Solve for x
    x = 181,663.30/482.61
  6. Step 6: Final answer
    x = 376.42

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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.