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Finding the Fourth Proportional to 228.51, 315.76 and 217.27

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Solution

The fourth proportional to 228.51, 315.76 and 217.27 is: 300.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.51 : 315.76 = 217.27 : x
  2. Step 2: Convert to fraction form
    228.51/315.76 = 217.27/x
  3. Step 3: Cross multiply
    228.51x = 315.76 × 217.27
  4. Step 4: Simplify right side
    228.51x = 68,605.18
  5. Step 5: Solve for x
    x = 68,605.18/228.51
  6. Step 6: Final answer
    x = 300.23

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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.