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Finding the Fourth Proportional to 366.05, 505.15 and 208.71

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Solution

The fourth proportional to 366.05, 505.15 and 208.71 is: 288.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.05 : 505.15 = 208.71 : x
  2. Step 2: Convert to fraction form
    366.05/505.15 = 208.71/x
  3. Step 3: Cross multiply
    366.05x = 505.15 × 208.71
  4. Step 4: Simplify right side
    366.05x = 105,429.33
  5. Step 5: Solve for x
    x = 105,429.33/366.05
  6. Step 6: Final answer
    x = 288.02

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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.