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Finding the Fourth Proportional to 228.35, 316.74 and 220.58

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Solution

The fourth proportional to 228.35, 316.74 and 220.58 is: 305.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.35 : 316.74 = 220.58 : x
  2. Step 2: Convert to fraction form
    228.35/316.74 = 220.58/x
  3. Step 3: Cross multiply
    228.35x = 316.74 × 220.58
  4. Step 4: Simplify right side
    228.35x = 69,867.06
  5. Step 5: Solve for x
    x = 69,867.06/228.35
  6. Step 6: Final answer
    x = 305.96

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.