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Finding the Fourth Proportional to 363.48, 544.98 and 209.22

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Solution

The fourth proportional to 363.48, 544.98 and 209.22 is: 313.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.48 : 544.98 = 209.22 : x
  2. Step 2: Convert to fraction form
    363.48/544.98 = 209.22/x
  3. Step 3: Cross multiply
    363.48x = 544.98 × 209.22
  4. Step 4: Simplify right side
    363.48x = 114,020.72
  5. Step 5: Solve for x
    x = 114,020.72/363.48
  6. Step 6: Final answer
    x = 313.69

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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.