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Finding the Fourth Proportional to 270.30, 405.40 and 167.40

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Solution

The fourth proportional to 270.30, 405.40 and 167.40 is: 251.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.30 : 405.40 = 167.40 : x
  2. Step 2: Convert to fraction form
    270.30/405.40 = 167.40/x
  3. Step 3: Cross multiply
    270.30x = 405.40 × 167.40
  4. Step 4: Simplify right side
    270.30x = 67,863.96
  5. Step 5: Solve for x
    x = 67,863.96/270.30
  6. Step 6: Final answer
    x = 251.07

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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.