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Finding the Fourth Proportional to 380.40, 524.97 and 214.58

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Solution

The fourth proportional to 380.40, 524.97 and 214.58 is: 296.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.40 : 524.97 = 214.58 : x
  2. Step 2: Convert to fraction form
    380.40/524.97 = 214.58/x
  3. Step 3: Cross multiply
    380.40x = 524.97 × 214.58
  4. Step 4: Simplify right side
    380.40x = 112,649.38
  5. Step 5: Solve for x
    x = 112,649.38/380.40
  6. Step 6: Final answer
    x = 296.14

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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.