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Finding the Fourth Proportional to 572.12, 858.23 and 225.43

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Solution

The fourth proportional to 572.12, 858.23 and 225.43 is: 338.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.12 : 858.23 = 225.43 : x
  2. Step 2: Convert to fraction form
    572.12/858.23 = 225.43/x
  3. Step 3: Cross multiply
    572.12x = 858.23 × 225.43
  4. Step 4: Simplify right side
    572.12x = 193,469.66
  5. Step 5: Solve for x
    x = 193,469.66/572.12
  6. Step 6: Final answer
    x = 338.16

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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.