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Finding the Fourth Proportional to 270.82, 405.72 and 173.20

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Solution

The fourth proportional to 270.82, 405.72 and 173.20 is: 259.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.82 : 405.72 = 173.20 : x
  2. Step 2: Convert to fraction form
    270.82/405.72 = 173.20/x
  3. Step 3: Cross multiply
    270.82x = 405.72 × 173.20
  4. Step 4: Simplify right side
    270.82x = 70,270.70
  5. Step 5: Solve for x
    x = 70,270.70/270.82
  6. Step 6: Final answer
    x = 259.47

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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.