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Finding the Fourth Proportional to 219.30, 302.61 and 131.97

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Solution

The fourth proportional to 219.30, 302.61 and 131.97 is: 182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.30 : 302.61 = 131.97 : x
  2. Step 2: Convert to fraction form
    219.30/302.61 = 131.97/x
  3. Step 3: Cross multiply
    219.30x = 302.61 × 131.97
  4. Step 4: Simplify right side
    219.30x = 39,935.44
  5. Step 5: Solve for x
    x = 39,935.44/219.30
  6. Step 6: Final answer
    x = 182.10

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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.