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Finding the Fourth Proportional to 572.45, 858.72 and 225.81

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Solution

The fourth proportional to 572.45, 858.72 and 225.81 is: 338.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.45 : 858.72 = 225.81 : x
  2. Step 2: Convert to fraction form
    572.45/858.72 = 225.81/x
  3. Step 3: Cross multiply
    572.45x = 858.72 × 225.81
  4. Step 4: Simplify right side
    572.45x = 193,907.56
  5. Step 5: Solve for x
    x = 193,907.56/572.45
  6. Step 6: Final answer
    x = 338.74

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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.