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Finding the Fourth Proportional to 205.88, 307.68 and 165.11

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Solution

The fourth proportional to 205.88, 307.68 and 165.11 is: 246.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.88 : 307.68 = 165.11 : x
  2. Step 2: Convert to fraction form
    205.88/307.68 = 165.11/x
  3. Step 3: Cross multiply
    205.88x = 307.68 × 165.11
  4. Step 4: Simplify right side
    205.88x = 50,798.89
  5. Step 5: Solve for x
    x = 50,798.89/205.88
  6. Step 6: Final answer
    x = 246.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.