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Finding the Fourth Proportional to 205.09, 305.80 and 201.45

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Solution

The fourth proportional to 205.09, 305.80 and 201.45 is: 300.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.09 : 305.80 = 201.45 : x
  2. Step 2: Convert to fraction form
    205.09/305.80 = 201.45/x
  3. Step 3: Cross multiply
    205.09x = 305.80 × 201.45
  4. Step 4: Simplify right side
    205.09x = 61,603.41
  5. Step 5: Solve for x
    x = 61,603.41/205.09
  6. Step 6: Final answer
    x = 300.37

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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.