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Finding the Fourth Proportional to 212.97, 294.05 and 143.16

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Solution

The fourth proportional to 212.97, 294.05 and 143.16 is: 197.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.97 : 294.05 = 143.16 : x
  2. Step 2: Convert to fraction form
    212.97/294.05 = 143.16/x
  3. Step 3: Cross multiply
    212.97x = 294.05 × 143.16
  4. Step 4: Simplify right side
    212.97x = 42,095.48
  5. Step 5: Solve for x
    x = 42,095.48/212.97
  6. Step 6: Final answer
    x = 197.66

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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.