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Finding the Fourth Proportional to 238.81, 357.33 and 206.68

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Solution

The fourth proportional to 238.81, 357.33 and 206.68 is: 309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.81 : 357.33 = 206.68 : x
  2. Step 2: Convert to fraction form
    238.81/357.33 = 206.68/x
  3. Step 3: Cross multiply
    238.81x = 357.33 × 206.68
  4. Step 4: Simplify right side
    238.81x = 73,852.96
  5. Step 5: Solve for x
    x = 73,852.96/238.81
  6. Step 6: Final answer
    x = 309.25

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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.