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Finding the Fourth Proportional to 248, 371.31 and 205.19

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Solution

The fourth proportional to 248, 371.31 and 205.19 is: 307.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    248 : 371.31 = 205.19 : x
  2. Step 2: Convert to fraction form
    248/371.31 = 205.19/x
  3. Step 3: Cross multiply
    248x = 371.31 × 205.19
  4. Step 4: Simplify right side
    248x = 76,189.10
  5. Step 5: Solve for x
    x = 76,189.10/248
  6. Step 6: Final answer
    x = 307.21

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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.