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Finding the Fourth Proportional to 270.32, 372.87 and 211.68

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Solution

The fourth proportional to 270.32, 372.87 and 211.68 is: 291.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.32 : 372.87 = 211.68 : x
  2. Step 2: Convert to fraction form
    270.32/372.87 = 211.68/x
  3. Step 3: Cross multiply
    270.32x = 372.87 × 211.68
  4. Step 4: Simplify right side
    270.32x = 78,929.12
  5. Step 5: Solve for x
    x = 78,929.12/270.32
  6. Step 6: Final answer
    x = 291.99

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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.