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Finding the Fourth Proportional to 219.17, 328.88 and 89.15

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Solution

The fourth proportional to 219.17, 328.88 and 89.15 is: 133.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.17 : 328.88 = 89.15 : x
  2. Step 2: Convert to fraction form
    219.17/328.88 = 89.15/x
  3. Step 3: Cross multiply
    219.17x = 328.88 × 89.15
  4. Step 4: Simplify right side
    219.17x = 29,317.56
  5. Step 5: Solve for x
    x = 29,317.56/219.17
  6. Step 6: Final answer
    x = 133.77

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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.