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Finding the Fourth Proportional to 272.22, 407.59 and 220.74

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Solution

The fourth proportional to 272.22, 407.59 and 220.74 is: 330.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.22 : 407.59 = 220.74 : x
  2. Step 2: Convert to fraction form
    272.22/407.59 = 220.74/x
  3. Step 3: Cross multiply
    272.22x = 407.59 × 220.74
  4. Step 4: Simplify right side
    272.22x = 89,971.42
  5. Step 5: Solve for x
    x = 89,971.42/272.22
  6. Step 6: Final answer
    x = 330.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.