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Finding the Fourth Proportional to 366.50, 505.78 and 209.14

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Solution

The fourth proportional to 366.50, 505.78 and 209.14 is: 288.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.50 : 505.78 = 209.14 : x
  2. Step 2: Convert to fraction form
    366.50/505.78 = 209.14/x
  3. Step 3: Cross multiply
    366.50x = 505.78 × 209.14
  4. Step 4: Simplify right side
    366.50x = 105,778.83
  5. Step 5: Solve for x
    x = 105,778.83/366.50
  6. Step 6: Final answer
    x = 288.62

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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.