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Finding the Fourth Proportional to 259.27, 357.21 and 193.66

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Solution

The fourth proportional to 259.27, 357.21 and 193.66 is: 266.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.27 : 357.21 = 193.66 : x
  2. Step 2: Convert to fraction form
    259.27/357.21 = 193.66/x
  3. Step 3: Cross multiply
    259.27x = 357.21 × 193.66
  4. Step 4: Simplify right side
    259.27x = 69,176.40
  5. Step 5: Solve for x
    x = 69,176.40/259.27
  6. Step 6: Final answer
    x = 266.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.