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Finding the Fourth Proportional to 206.41, 284.64 and 157.45

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Solution

The fourth proportional to 206.41, 284.64 and 157.45 is: 217.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.41 : 284.64 = 157.45 : x
  2. Step 2: Convert to fraction form
    206.41/284.64 = 157.45/x
  3. Step 3: Cross multiply
    206.41x = 284.64 × 157.45
  4. Step 4: Simplify right side
    206.41x = 44,816.57
  5. Step 5: Solve for x
    x = 44,816.57/206.41
  6. Step 6: Final answer
    x = 217.12

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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.