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Finding the Fourth Proportional to 213.54, 294.78 and 148.38

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Solution

The fourth proportional to 213.54, 294.78 and 148.38 is: 204.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.54 : 294.78 = 148.38 : x
  2. Step 2: Convert to fraction form
    213.54/294.78 = 148.38/x
  3. Step 3: Cross multiply
    213.54x = 294.78 × 148.38
  4. Step 4: Simplify right side
    213.54x = 43,739.46
  5. Step 5: Solve for x
    x = 43,739.46/213.54
  6. Step 6: Final answer
    x = 204.83

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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.