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Finding the Fourth Proportional to 380.18, 524.61 and 261.92

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Solution

The fourth proportional to 380.18, 524.61 and 261.92 is: 361.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.18 : 524.61 = 261.92 : x
  2. Step 2: Convert to fraction form
    380.18/524.61 = 261.92/x
  3. Step 3: Cross multiply
    380.18x = 524.61 × 261.92
  4. Step 4: Simplify right side
    380.18x = 137,407.16
  5. Step 5: Solve for x
    x = 137,407.16/380.18
  6. Step 6: Final answer
    x = 361.42

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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.