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Finding the Fourth Proportional to 439.36, 605.16 and 322.72

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Solution

The fourth proportional to 439.36, 605.16 and 322.72 is: 444.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.36 : 605.16 = 322.72 : x
  2. Step 2: Convert to fraction form
    439.36/605.16 = 322.72/x
  3. Step 3: Cross multiply
    439.36x = 605.16 × 322.72
  4. Step 4: Simplify right side
    439.36x = 195,297.24
  5. Step 5: Solve for x
    x = 195,297.24/439.36
  6. Step 6: Final answer
    x = 444.50

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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.