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Finding the Fourth Proportional to 206.56, 307.43 and 197.68

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Solution

The fourth proportional to 206.56, 307.43 and 197.68 is: 294.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.56 : 307.43 = 197.68 : x
  2. Step 2: Convert to fraction form
    206.56/307.43 = 197.68/x
  3. Step 3: Cross multiply
    206.56x = 307.43 × 197.68
  4. Step 4: Simplify right side
    206.56x = 60,772.76
  5. Step 5: Solve for x
    x = 60,772.76/206.56
  6. Step 6: Final answer
    x = 294.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.