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Finding the Fourth Proportional to 538.92, 808.20 and 214.20

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Solution

The fourth proportional to 538.92, 808.20 and 214.20 is: 321.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.92 : 808.20 = 214.20 : x
  2. Step 2: Convert to fraction form
    538.92/808.20 = 214.20/x
  3. Step 3: Cross multiply
    538.92x = 808.20 × 214.20
  4. Step 4: Simplify right side
    538.92x = 173,116.44
  5. Step 5: Solve for x
    x = 173,116.44/538.92
  6. Step 6: Final answer
    x = 321.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.