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Finding the Fourth Proportional to 380.63, 525.16 and 225.38

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Solution

The fourth proportional to 380.63, 525.16 and 225.38 is: 310.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.63 : 525.16 = 225.38 : x
  2. Step 2: Convert to fraction form
    380.63/525.16 = 225.38/x
  3. Step 3: Cross multiply
    380.63x = 525.16 × 225.38
  4. Step 4: Simplify right side
    380.63x = 118,360.56
  5. Step 5: Solve for x
    x = 118,360.56/380.63
  6. Step 6: Final answer
    x = 310.96

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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.