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Finding the Fourth Proportional to 439.20, 605.52 and 365.22

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Solution

The fourth proportional to 439.20, 605.52 and 365.22 is: 503.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.20 : 605.52 = 365.22 : x
  2. Step 2: Convert to fraction form
    439.20/605.52 = 365.22/x
  3. Step 3: Cross multiply
    439.20x = 605.52 × 365.22
  4. Step 4: Simplify right side
    439.20x = 221,148.01
  5. Step 5: Solve for x
    x = 221,148.01/439.20
  6. Step 6: Final answer
    x = 503.52

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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.