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Finding the Fourth Proportional to 239.48, 357.35 and 225.72

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Solution

The fourth proportional to 239.48, 357.35 and 225.72 is: 336.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.48 : 357.35 = 225.72 : x
  2. Step 2: Convert to fraction form
    239.48/357.35 = 225.72/x
  3. Step 3: Cross multiply
    239.48x = 357.35 × 225.72
  4. Step 4: Simplify right side
    239.48x = 80,661.04
  5. Step 5: Solve for x
    x = 80,661.04/239.48
  6. Step 6: Final answer
    x = 336.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.