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Finding the Fourth Proportional to 255.24, 351.90 and 225.72

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Solution

The fourth proportional to 255.24, 351.90 and 225.72 is: 311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.24 : 351.90 = 225.72 : x
  2. Step 2: Convert to fraction form
    255.24/351.90 = 225.72/x
  3. Step 3: Cross multiply
    255.24x = 351.90 × 225.72
  4. Step 4: Simplify right side
    255.24x = 79,430.87
  5. Step 5: Solve for x
    x = 79,430.87/255.24
  6. Step 6: Final answer
    x = 311.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.