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Finding the Fourth Proportional to 255.18, 351.40 and 185.11

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Solution

The fourth proportional to 255.18, 351.40 and 185.11 is: 254.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.18 : 351.40 = 185.11 : x
  2. Step 2: Convert to fraction form
    255.18/351.40 = 185.11/x
  3. Step 3: Cross multiply
    255.18x = 351.40 × 185.11
  4. Step 4: Simplify right side
    255.18x = 65,048.07
  5. Step 5: Solve for x
    x = 65,048.07/255.18
  6. Step 6: Final answer
    x = 254.91

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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.