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Finding the Fourth Proportional to 281.13, 421.41 and 159.51

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Solution

The fourth proportional to 281.13, 421.41 and 159.51 is: 239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.13 : 421.41 = 159.51 : x
  2. Step 2: Convert to fraction form
    281.13/421.41 = 159.51/x
  3. Step 3: Cross multiply
    281.13x = 421.41 × 159.51
  4. Step 4: Simplify right side
    281.13x = 67,219.11
  5. Step 5: Solve for x
    x = 67,219.11/281.13
  6. Step 6: Final answer
    x = 239.10

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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.