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Finding the Fourth Proportional to 148.90, 221.68 and 148.22

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Solution

The fourth proportional to 148.90, 221.68 and 148.22 is: 220.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.90 : 221.68 = 148.22 : x
  2. Step 2: Convert to fraction form
    148.90/221.68 = 148.22/x
  3. Step 3: Cross multiply
    148.90x = 221.68 × 148.22
  4. Step 4: Simplify right side
    148.90x = 32,857.41
  5. Step 5: Solve for x
    x = 32,857.41/148.90
  6. Step 6: Final answer
    x = 220.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.