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Finding the Fourth Proportional to 220.70, 330.83 and 117.91

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Solution

The fourth proportional to 220.70, 330.83 and 117.91 is: 176.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.70 : 330.83 = 117.91 : x
  2. Step 2: Convert to fraction form
    220.70/330.83 = 117.91/x
  3. Step 3: Cross multiply
    220.70x = 330.83 × 117.91
  4. Step 4: Simplify right side
    220.70x = 39,008.17
  5. Step 5: Solve for x
    x = 39,008.17/220.70
  6. Step 6: Final answer
    x = 176.75

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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.