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Finding the Fourth Proportional to 219.31, 328.67 and 188.66

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Solution

The fourth proportional to 219.31, 328.67 and 188.66 is: 282.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.31 : 328.67 = 188.66 : x
  2. Step 2: Convert to fraction form
    219.31/328.67 = 188.66/x
  3. Step 3: Cross multiply
    219.31x = 328.67 × 188.66
  4. Step 4: Simplify right side
    219.31x = 62,006.88
  5. Step 5: Solve for x
    x = 62,006.88/219.31
  6. Step 6: Final answer
    x = 282.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.