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Finding the Fourth Proportional to 228.29, 340.50 and 221.47

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Solution

The fourth proportional to 228.29, 340.50 and 221.47 is: 330.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.29 : 340.50 = 221.47 : x
  2. Step 2: Convert to fraction form
    228.29/340.50 = 221.47/x
  3. Step 3: Cross multiply
    228.29x = 340.50 × 221.47
  4. Step 4: Simplify right side
    228.29x = 75,410.51
  5. Step 5: Solve for x
    x = 75,410.51/228.29
  6. Step 6: Final answer
    x = 330.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.