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Finding the Fourth Proportional to 228.24, 316.60 and 219.60

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Solution

The fourth proportional to 228.24, 316.60 and 219.60 is: 304.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.24 : 316.60 = 219.60 : x
  2. Step 2: Convert to fraction form
    228.24/316.60 = 219.60/x
  3. Step 3: Cross multiply
    228.24x = 316.60 × 219.60
  4. Step 4: Simplify right side
    228.24x = 69,525.36
  5. Step 5: Solve for x
    x = 69,525.36/228.24
  6. Step 6: Final answer
    x = 304.62

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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.