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Finding the Fourth Proportional to 281.83, 422.80 and 99.33

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Solution

The fourth proportional to 281.83, 422.80 and 99.33 is: 149.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.83 : 422.80 = 99.33 : x
  2. Step 2: Convert to fraction form
    281.83/422.80 = 99.33/x
  3. Step 3: Cross multiply
    281.83x = 422.80 × 99.33
  4. Step 4: Simplify right side
    281.83x = 41,996.23
  5. Step 5: Solve for x
    x = 41,996.23/281.83
  6. Step 6: Final answer
    x = 149.01

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