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Finding the Fourth Proportional to 228.72, 343.02 and 98.73

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Solution

The fourth proportional to 228.72, 343.02 and 98.73 is: 148.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.72 : 343.02 = 98.73 : x
  2. Step 2: Convert to fraction form
    228.72/343.02 = 98.73/x
  3. Step 3: Cross multiply
    228.72x = 343.02 × 98.73
  4. Step 4: Simplify right side
    228.72x = 33,866.36
  5. Step 5: Solve for x
    x = 33,866.36/228.72
  6. Step 6: Final answer
    x = 148.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.