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Finding the Fourth Proportional to 180.21, 248.86 and 143.64

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Solution

The fourth proportional to 180.21, 248.86 and 143.64 is: 198.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.21 : 248.86 = 143.64 : x
  2. Step 2: Convert to fraction form
    180.21/248.86 = 143.64/x
  3. Step 3: Cross multiply
    180.21x = 248.86 × 143.64
  4. Step 4: Simplify right side
    180.21x = 35,746.25
  5. Step 5: Solve for x
    x = 35,746.25/180.21
  6. Step 6: Final answer
    x = 198.36

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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.