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Finding the Fourth Proportional to 209.66, 290.50 and 206.01

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Solution

The fourth proportional to 209.66, 290.50 and 206.01 is: 285.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.66 : 290.50 = 206.01 : x
  2. Step 2: Convert to fraction form
    209.66/290.50 = 206.01/x
  3. Step 3: Cross multiply
    209.66x = 290.50 × 206.01
  4. Step 4: Simplify right side
    209.66x = 59,845.39
  5. Step 5: Solve for x
    x = 59,845.39/209.66
  6. Step 6: Final answer
    x = 285.45

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.