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Finding the Fourth Proportional to 205.09, 307.64 and 190.51

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Solution

The fourth proportional to 205.09, 307.64 and 190.51 is: 285.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.09 : 307.64 = 190.51 : x
  2. Step 2: Convert to fraction form
    205.09/307.64 = 190.51/x
  3. Step 3: Cross multiply
    205.09x = 307.64 × 190.51
  4. Step 4: Simplify right side
    205.09x = 58,608.50
  5. Step 5: Solve for x
    x = 58,608.50/205.09
  6. Step 6: Final answer
    x = 285.77

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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.