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Finding the Fourth Proportional to 362.80, 543.40 and 191.60

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Solution

The fourth proportional to 362.80, 543.40 and 191.60 is: 286.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.80 : 543.40 = 191.60 : x
  2. Step 2: Convert to fraction form
    362.80/543.40 = 191.60/x
  3. Step 3: Cross multiply
    362.80x = 543.40 × 191.60
  4. Step 4: Simplify right side
    362.80x = 104,115.44
  5. Step 5: Solve for x
    x = 104,115.44/362.80
  6. Step 6: Final answer
    x = 286.98

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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.