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Finding the Fourth Proportional to 149.76, 222.78 and 148.20

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Solution

The fourth proportional to 149.76, 222.78 and 148.20 is: 220.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.76 : 222.78 = 148.20 : x
  2. Step 2: Convert to fraction form
    149.76/222.78 = 148.20/x
  3. Step 3: Cross multiply
    149.76x = 222.78 × 148.20
  4. Step 4: Simplify right side
    149.76x = 33,016.00
  5. Step 5: Solve for x
    x = 33,016.00/149.76
  6. Step 6: Final answer
    x = 220.46

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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.