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Finding the Fourth Proportional to 222.12, 306.48 and 148.53

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Solution

The fourth proportional to 222.12, 306.48 and 148.53 is: 204.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.12 : 306.48 = 148.53 : x
  2. Step 2: Convert to fraction form
    222.12/306.48 = 148.53/x
  3. Step 3: Cross multiply
    222.12x = 306.48 × 148.53
  4. Step 4: Simplify right side
    222.12x = 45,521.47
  5. Step 5: Solve for x
    x = 45,521.47/222.12
  6. Step 6: Final answer
    x = 204.94

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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.