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Finding the Fourth Proportional to 365.50, 504.40 and 208.11

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Solution

The fourth proportional to 365.50, 504.40 and 208.11 is: 287.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.50 : 504.40 = 208.11 : x
  2. Step 2: Convert to fraction form
    365.50/504.40 = 208.11/x
  3. Step 3: Cross multiply
    365.50x = 504.40 × 208.11
  4. Step 4: Simplify right side
    365.50x = 104,970.68
  5. Step 5: Solve for x
    x = 104,970.68/365.50
  6. Step 6: Final answer
    x = 287.20

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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.