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Finding the Fourth Proportional to 234.64, 323.88 and 215.20

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Solution

The fourth proportional to 234.64, 323.88 and 215.20 is: 297.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.64 : 323.88 = 215.20 : x
  2. Step 2: Convert to fraction form
    234.64/323.88 = 215.20/x
  3. Step 3: Cross multiply
    234.64x = 323.88 × 215.20
  4. Step 4: Simplify right side
    234.64x = 69,698.98
  5. Step 5: Solve for x
    x = 69,698.98/234.64
  6. Step 6: Final answer
    x = 297.05

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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.