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Finding the Fourth Proportional to 423.26, 634.38 and 192.21

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Solution

The fourth proportional to 423.26, 634.38 and 192.21 is: 288.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.26 : 634.38 = 192.21 : x
  2. Step 2: Convert to fraction form
    423.26/634.38 = 192.21/x
  3. Step 3: Cross multiply
    423.26x = 634.38 × 192.21
  4. Step 4: Simplify right side
    423.26x = 121,934.18
  5. Step 5: Solve for x
    x = 121,934.18/423.26
  6. Step 6: Final answer
    x = 288.08

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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.