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Finding the Fourth Proportional to 363.21, 543.79 and 247.51

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Solution

The fourth proportional to 363.21, 543.79 and 247.51 is: 370.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.21 : 543.79 = 247.51 : x
  2. Step 2: Convert to fraction form
    363.21/543.79 = 247.51/x
  3. Step 3: Cross multiply
    363.21x = 543.79 × 247.51
  4. Step 4: Simplify right side
    363.21x = 134,593.46
  5. Step 5: Solve for x
    x = 134,593.46/363.21
  6. Step 6: Final answer
    x = 370.57

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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.