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Finding the Fourth Proportional to 206.37, 309.33 and 103.45

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Solution

The fourth proportional to 206.37, 309.33 and 103.45 is: 155.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.37 : 309.33 = 103.45 : x
  2. Step 2: Convert to fraction form
    206.37/309.33 = 103.45/x
  3. Step 3: Cross multiply
    206.37x = 309.33 × 103.45
  4. Step 4: Simplify right side
    206.37x = 31,998.12
  5. Step 5: Solve for x
    x = 31,998.12/206.37
  6. Step 6: Final answer
    x = 155.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.