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Finding the Fourth Proportional to 219.40, 302.76 and 167.56

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Solution

The fourth proportional to 219.40, 302.76 and 167.56 is: 231.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.40 : 302.76 = 167.56 : x
  2. Step 2: Convert to fraction form
    219.40/302.76 = 167.56/x
  3. Step 3: Cross multiply
    219.40x = 302.76 × 167.56
  4. Step 4: Simplify right side
    219.40x = 50,730.47
  5. Step 5: Solve for x
    x = 50,730.47/219.40
  6. Step 6: Final answer
    x = 231.22

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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.