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Finding the Fourth Proportional to 213.47, 294.66 and 143.48

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Solution

The fourth proportional to 213.47, 294.66 and 143.48 is: 198.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.47 : 294.66 = 143.48 : x
  2. Step 2: Convert to fraction form
    213.47/294.66 = 143.48/x
  3. Step 3: Cross multiply
    213.47x = 294.66 × 143.48
  4. Step 4: Simplify right side
    213.47x = 42,278.55
  5. Step 5: Solve for x
    x = 42,278.55/213.47
  6. Step 6: Final answer
    x = 198.06

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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.