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Finding the Fourth Proportional to 380.80, 525.36 and 231.34

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Solution

The fourth proportional to 380.80, 525.36 and 231.34 is: 319.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.80 : 525.36 = 231.34 : x
  2. Step 2: Convert to fraction form
    380.80/525.36 = 231.34/x
  3. Step 3: Cross multiply
    380.80x = 525.36 × 231.34
  4. Step 4: Simplify right side
    380.80x = 121,536.78
  5. Step 5: Solve for x
    x = 121,536.78/380.80
  6. Step 6: Final answer
    x = 319.16

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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.