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Finding the Fourth Proportional to 255.15, 351.90 and 167.67

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Solution

The fourth proportional to 255.15, 351.90 and 167.67 is: 231.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.15 : 351.90 = 167.67 : x
  2. Step 2: Convert to fraction form
    255.15/351.90 = 167.67/x
  3. Step 3: Cross multiply
    255.15x = 351.90 × 167.67
  4. Step 4: Simplify right side
    255.15x = 59,003.07
  5. Step 5: Solve for x
    x = 59,003.07/255.15
  6. Step 6: Final answer
    x = 231.25

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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.