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Finding the Fourth Proportional to 146.40, 219.39 and 98

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Solution

The fourth proportional to 146.40, 219.39 and 98 is: 146.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.40 : 219.39 = 98 : x
  2. Step 2: Convert to fraction form
    146.40/219.39 = 98/x
  3. Step 3: Cross multiply
    146.40x = 219.39 × 98
  4. Step 4: Simplify right side
    146.40x = 21,500.22
  5. Step 5: Solve for x
    x = 21,500.22/146.40
  6. Step 6: Final answer
    x = 146.86

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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.