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Finding the Fourth Proportional to 140.83, 211.60 and 131.28

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Solution

The fourth proportional to 140.83, 211.60 and 131.28 is: 197.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.83 : 211.60 = 131.28 : x
  2. Step 2: Convert to fraction form
    140.83/211.60 = 131.28/x
  3. Step 3: Cross multiply
    140.83x = 211.60 × 131.28
  4. Step 4: Simplify right side
    140.83x = 27,778.85
  5. Step 5: Solve for x
    x = 27,778.85/140.83
  6. Step 6: Final answer
    x = 197.25

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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.