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Finding the Fourth Proportional to 366.45, 505.65 and 209.03

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Solution

The fourth proportional to 366.45, 505.65 and 209.03 is: 288.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.45 : 505.65 = 209.03 : x
  2. Step 2: Convert to fraction form
    366.45/505.65 = 209.03/x
  3. Step 3: Cross multiply
    366.45x = 505.65 × 209.03
  4. Step 4: Simplify right side
    366.45x = 105,694.28
  5. Step 5: Solve for x
    x = 105,694.28/366.45
  6. Step 6: Final answer
    x = 288.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.