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Finding the Fourth Proportional to 439.74, 603.90 and 377.55

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Solution

The fourth proportional to 439.74, 603.90 and 377.55 is: 518.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.74 : 603.90 = 377.55 : x
  2. Step 2: Convert to fraction form
    439.74/603.90 = 377.55/x
  3. Step 3: Cross multiply
    439.74x = 603.90 × 377.55
  4. Step 4: Simplify right side
    439.74x = 228,002.45
  5. Step 5: Solve for x
    x = 228,002.45/439.74
  6. Step 6: Final answer
    x = 518.49

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.