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Finding the Fourth Proportional to 358.66, 538.30 and 221.83

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Solution

The fourth proportional to 358.66, 538.30 and 221.83 is: 332.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.66 : 538.30 = 221.83 : x
  2. Step 2: Convert to fraction form
    358.66/538.30 = 221.83/x
  3. Step 3: Cross multiply
    358.66x = 538.30 × 221.83
  4. Step 4: Simplify right side
    358.66x = 119,410.02
  5. Step 5: Solve for x
    x = 119,410.02/358.66
  6. Step 6: Final answer
    x = 332.93

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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.