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Finding the Fourth Proportional to 380.71, 525.39 and 223.34

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Solution

The fourth proportional to 380.71, 525.39 and 223.34 is: 308.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.71 : 525.39 = 223.34 : x
  2. Step 2: Convert to fraction form
    380.71/525.39 = 223.34/x
  3. Step 3: Cross multiply
    380.71x = 525.39 × 223.34
  4. Step 4: Simplify right side
    380.71x = 117,337.14
  5. Step 5: Solve for x
    x = 117,337.14/380.71
  6. Step 6: Final answer
    x = 308.21

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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.