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Finding the Fourth Proportional to 206.47, 284.80 and 157.33

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Solution

The fourth proportional to 206.47, 284.80 and 157.33 is: 217.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.47 : 284.80 = 157.33 : x
  2. Step 2: Convert to fraction form
    206.47/284.80 = 157.33/x
  3. Step 3: Cross multiply
    206.47x = 284.80 × 157.33
  4. Step 4: Simplify right side
    206.47x = 44,805.37
  5. Step 5: Solve for x
    x = 44,805.37/206.47
  6. Step 6: Final answer
    x = 217.01

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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.