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Finding the Fourth Proportional to 299.49, 448.75 and 231.18

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Solution

The fourth proportional to 299.49, 448.75 and 231.18 is: 346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.49 : 448.75 = 231.18 : x
  2. Step 2: Convert to fraction form
    299.49/448.75 = 231.18/x
  3. Step 3: Cross multiply
    299.49x = 448.75 × 231.18
  4. Step 4: Simplify right side
    299.49x = 103,742.03
  5. Step 5: Solve for x
    x = 103,742.03/299.49
  6. Step 6: Final answer
    x = 346.40

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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.