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Finding the Fourth Proportional to 367.78, 507.36 and 220.36

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Solution

The fourth proportional to 367.78, 507.36 and 220.36 is: 303.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.78 : 507.36 = 220.36 : x
  2. Step 2: Convert to fraction form
    367.78/507.36 = 220.36/x
  3. Step 3: Cross multiply
    367.78x = 507.36 × 220.36
  4. Step 4: Simplify right side
    367.78x = 111,801.85
  5. Step 5: Solve for x
    x = 111,801.85/367.78
  6. Step 6: Final answer
    x = 303.99

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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.