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Finding the Fourth Proportional to 330.63, 496.26 and 209.19

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Solution

The fourth proportional to 330.63, 496.26 and 209.19 is: 313.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.63 : 496.26 = 209.19 : x
  2. Step 2: Convert to fraction form
    330.63/496.26 = 209.19/x
  3. Step 3: Cross multiply
    330.63x = 496.26 × 209.19
  4. Step 4: Simplify right side
    330.63x = 103,812.63
  5. Step 5: Solve for x
    x = 103,812.63/330.63
  6. Step 6: Final answer
    x = 313.98

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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.