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Finding the Fourth Proportional to 414.71, 572.31 and 228.21

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Solution

The fourth proportional to 414.71, 572.31 and 228.21 is: 314.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.71 : 572.31 = 228.21 : x
  2. Step 2: Convert to fraction form
    414.71/572.31 = 228.21/x
  3. Step 3: Cross multiply
    414.71x = 572.31 × 228.21
  4. Step 4: Simplify right side
    414.71x = 130,606.87
  5. Step 5: Solve for x
    x = 130,606.87/414.71
  6. Step 6: Final answer
    x = 314.94

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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.