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Finding the Fourth Proportional to 365.99, 505.13 and 218.63

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Solution

The fourth proportional to 365.99, 505.13 and 218.63 is: 301.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.99 : 505.13 = 218.63 : x
  2. Step 2: Convert to fraction form
    365.99/505.13 = 218.63/x
  3. Step 3: Cross multiply
    365.99x = 505.13 × 218.63
  4. Step 4: Simplify right side
    365.99x = 110,436.74
  5. Step 5: Solve for x
    x = 110,436.74/365.99
  6. Step 6: Final answer
    x = 301.75

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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.