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Finding the Fourth Proportional to 147.22, 202.88 and 143.62

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Solution

The fourth proportional to 147.22, 202.88 and 143.62 is: 197.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.22 : 202.88 = 143.62 : x
  2. Step 2: Convert to fraction form
    147.22/202.88 = 143.62/x
  3. Step 3: Cross multiply
    147.22x = 202.88 × 143.62
  4. Step 4: Simplify right side
    147.22x = 29,137.63
  5. Step 5: Solve for x
    x = 29,137.63/147.22
  6. Step 6: Final answer
    x = 197.92

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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.