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Finding the Fourth Proportional to 228.17, 340.08 and 220.67

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Solution

The fourth proportional to 228.17, 340.08 and 220.67 is: 328.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.17 : 340.08 = 220.67 : x
  2. Step 2: Convert to fraction form
    228.17/340.08 = 220.67/x
  3. Step 3: Cross multiply
    228.17x = 340.08 × 220.67
  4. Step 4: Simplify right side
    228.17x = 75,043.75
  5. Step 5: Solve for x
    x = 75,043.75/228.17
  6. Step 6: Final answer
    x = 328.90

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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.