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Finding the Fourth Proportional to 362.39, 543.11 and 208.40

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Solution

The fourth proportional to 362.39, 543.11 and 208.40 is: 312.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.39 : 543.11 = 208.40 : x
  2. Step 2: Convert to fraction form
    362.39/543.11 = 208.40/x
  3. Step 3: Cross multiply
    362.39x = 543.11 × 208.40
  4. Step 4: Simplify right side
    362.39x = 113,184.12
  5. Step 5: Solve for x
    x = 113,184.12/362.39
  6. Step 6: Final answer
    x = 312.33

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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.