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Finding the Fourth Proportional to 220.75, 304.74 and 142.11

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Solution

The fourth proportional to 220.75, 304.74 and 142.11 is: 196.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.75 : 304.74 = 142.11 : x
  2. Step 2: Convert to fraction form
    220.75/304.74 = 142.11/x
  3. Step 3: Cross multiply
    220.75x = 304.74 × 142.11
  4. Step 4: Simplify right side
    220.75x = 43,306.60
  5. Step 5: Solve for x
    x = 43,306.60/220.75
  6. Step 6: Final answer
    x = 196.18

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Find fourth proportional to 110.38, 152.37 and 71.06
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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.