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Finding the Fourth Proportional to 267.90, 402.21 and 181.77

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Solution

The fourth proportional to 267.90, 402.21 and 181.77 is: 272.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.90 : 402.21 = 181.77 : x
  2. Step 2: Convert to fraction form
    267.90/402.21 = 181.77/x
  3. Step 3: Cross multiply
    267.90x = 402.21 × 181.77
  4. Step 4: Simplify right side
    267.90x = 73,109.71
  5. Step 5: Solve for x
    x = 73,109.71/267.90
  6. Step 6: Final answer
    x = 272.90

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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.