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Finding the Fourth Proportional to 228.25, 314.65 and 161.65

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Solution

The fourth proportional to 228.25, 314.65 and 161.65 is: 222.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.25 : 314.65 = 161.65 : x
  2. Step 2: Convert to fraction form
    228.25/314.65 = 161.65/x
  3. Step 3: Cross multiply
    228.25x = 314.65 × 161.65
  4. Step 4: Simplify right side
    228.25x = 50,863.77
  5. Step 5: Solve for x
    x = 50,863.77/228.25
  6. Step 6: Final answer
    x = 222.84

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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.