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Finding the Fourth Proportional to 439.40, 605.90 and 377.44

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Solution

The fourth proportional to 439.40, 605.90 and 377.44 is: 520.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.40 : 605.90 = 377.44 : x
  2. Step 2: Convert to fraction form
    439.40/605.90 = 377.44/x
  3. Step 3: Cross multiply
    439.40x = 605.90 × 377.44
  4. Step 4: Simplify right side
    439.40x = 228,690.90
  5. Step 5: Solve for x
    x = 228,690.90/439.40
  6. Step 6: Final answer
    x = 520.46

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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.