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Finding the Fourth Proportional to 362.79, 543.47 and 208.22

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Solution

The fourth proportional to 362.79, 543.47 and 208.22 is: 311.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.79 : 543.47 = 208.22 : x
  2. Step 2: Convert to fraction form
    362.79/543.47 = 208.22/x
  3. Step 3: Cross multiply
    362.79x = 543.47 × 208.22
  4. Step 4: Simplify right side
    362.79x = 113,157.56
  5. Step 5: Solve for x
    x = 113,157.56/362.79
  6. Step 6: Final answer
    x = 311.91

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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.