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Finding the Fourth Proportional to 439.45, 604.83 and 314.91

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Solution

The fourth proportional to 439.45, 604.83 and 314.91 is: 433.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.45 : 604.83 = 314.91 : x
  2. Step 2: Convert to fraction form
    439.45/604.83 = 314.91/x
  3. Step 3: Cross multiply
    439.45x = 604.83 × 314.91
  4. Step 4: Simplify right side
    439.45x = 190,467.02
  5. Step 5: Solve for x
    x = 190,467.02/439.45
  6. Step 6: Final answer
    x = 433.42

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.