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Finding the Fourth Proportional to 612.98, 845.89 and 333.21

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Solution

The fourth proportional to 612.98, 845.89 and 333.21 is: 459.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.98 : 845.89 = 333.21 : x
  2. Step 2: Convert to fraction form
    612.98/845.89 = 333.21/x
  3. Step 3: Cross multiply
    612.98x = 845.89 × 333.21
  4. Step 4: Simplify right side
    612.98x = 281,859.01
  5. Step 5: Solve for x
    x = 281,859.01/612.98
  6. Step 6: Final answer
    x = 459.82

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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.