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Finding the Fourth Proportional to 211.68, 290.34 and 206.28

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Solution

The fourth proportional to 211.68, 290.34 and 206.28 is: 282.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.68 : 290.34 = 206.28 : x
  2. Step 2: Convert to fraction form
    211.68/290.34 = 206.28/x
  3. Step 3: Cross multiply
    211.68x = 290.34 × 206.28
  4. Step 4: Simplify right side
    211.68x = 59,891.34
  5. Step 5: Solve for x
    x = 59,891.34/211.68
  6. Step 6: Final answer
    x = 282.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.