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Finding the Fourth Proportional to 439.19, 604.28 and 379.98

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Solution

The fourth proportional to 439.19, 604.28 and 379.98 is: 522.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.19 : 604.28 = 379.98 : x
  2. Step 2: Convert to fraction form
    439.19/604.28 = 379.98/x
  3. Step 3: Cross multiply
    439.19x = 604.28 × 379.98
  4. Step 4: Simplify right side
    439.19x = 229,612.41
  5. Step 5: Solve for x
    x = 229,612.41/439.19
  6. Step 6: Final answer
    x = 522.81

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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.