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Finding the Fourth Proportional to 572.43, 858.71 and 225.72

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Solution

The fourth proportional to 572.43, 858.71 and 225.72 is: 338.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.43 : 858.71 = 225.72 : x
  2. Step 2: Convert to fraction form
    572.43/858.71 = 225.72/x
  3. Step 3: Cross multiply
    572.43x = 858.71 × 225.72
  4. Step 4: Simplify right side
    572.43x = 193,828.59
  5. Step 5: Solve for x
    x = 193,828.59/572.43
  6. Step 6: Final answer
    x = 338.61

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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.