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Finding the Fourth Proportional to 270.29, 372.30 and 187.21

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Solution

The fourth proportional to 270.29, 372.30 and 187.21 is: 257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.29 : 372.30 = 187.21 : x
  2. Step 2: Convert to fraction form
    270.29/372.30 = 187.21/x
  3. Step 3: Cross multiply
    270.29x = 372.30 × 187.21
  4. Step 4: Simplify right side
    270.29x = 69,698.05
  5. Step 5: Solve for x
    x = 69,698.05/270.29
  6. Step 6: Final answer
    x = 257.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.