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Finding the Fourth Proportional to 408.14, 611.93 and 148.08

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Solution

The fourth proportional to 408.14, 611.93 and 148.08 is: 222.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.14 : 611.93 = 148.08 : x
  2. Step 2: Convert to fraction form
    408.14/611.93 = 148.08/x
  3. Step 3: Cross multiply
    408.14x = 611.93 × 148.08
  4. Step 4: Simplify right side
    408.14x = 90,614.59
  5. Step 5: Solve for x
    x = 90,614.59/408.14
  6. Step 6: Final answer
    x = 222.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.