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Finding the Fourth Proportional to 380.38, 524.90 and 214.60

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Solution

The fourth proportional to 380.38, 524.90 and 214.60 is: 296.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.38 : 524.90 = 214.60 : x
  2. Step 2: Convert to fraction form
    380.38/524.90 = 214.60/x
  3. Step 3: Cross multiply
    380.38x = 524.90 × 214.60
  4. Step 4: Simplify right side
    380.38x = 112,640.92
  5. Step 5: Solve for x
    x = 112,640.92/380.38
  6. Step 6: Final answer
    x = 296.13

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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.