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Finding the Fourth Proportional to 272.22, 405.93 and 239.88

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Solution

The fourth proportional to 272.22, 405.93 and 239.88 is: 357.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.22 : 405.93 = 239.88 : x
  2. Step 2: Convert to fraction form
    272.22/405.93 = 239.88/x
  3. Step 3: Cross multiply
    272.22x = 405.93 × 239.88
  4. Step 4: Simplify right side
    272.22x = 97,374.49
  5. Step 5: Solve for x
    x = 97,374.49/272.22
  6. Step 6: Final answer
    x = 357.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.