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Finding the Fourth Proportional to 358.68, 538.20 and 214.50

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Solution

The fourth proportional to 358.68, 538.20 and 214.50 is: 321.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.68 : 538.20 = 214.50 : x
  2. Step 2: Convert to fraction form
    358.68/538.20 = 214.50/x
  3. Step 3: Cross multiply
    358.68x = 538.20 × 214.50
  4. Step 4: Simplify right side
    358.68x = 115,443.90
  5. Step 5: Solve for x
    x = 115,443.90/358.68
  6. Step 6: Final answer
    x = 321.86

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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.