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Finding the Fourth Proportional to 145.26, 217.49 and 122.45

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Solution

The fourth proportional to 145.26, 217.49 and 122.45 is: 183.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.26 : 217.49 = 122.45 : x
  2. Step 2: Convert to fraction form
    145.26/217.49 = 122.45/x
  3. Step 3: Cross multiply
    145.26x = 217.49 × 122.45
  4. Step 4: Simplify right side
    145.26x = 26,629.95
  5. Step 5: Solve for x
    x = 26,629.95/145.26
  6. Step 6: Final answer
    x = 183.33

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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.