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Finding the Fourth Proportional to 281.00, 421.19 and 98.29

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Solution

The fourth proportional to 281.00, 421.19 and 98.29 is: 147.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.00 : 421.19 = 98.29 : x
  2. Step 2: Convert to fraction form
    281.00/421.19 = 98.29/x
  3. Step 3: Cross multiply
    281.00x = 421.19 × 98.29
  4. Step 4: Simplify right side
    281.00x = 41,398.27
  5. Step 5: Solve for x
    x = 41,398.27/281.00
  6. Step 6: Final answer
    x = 147.33

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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.