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Finding the Fourth Proportional to 445.05, 612.90 and 334.80

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Solution

The fourth proportional to 445.05, 612.90 and 334.80 is: 461.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.05 : 612.90 = 334.80 : x
  2. Step 2: Convert to fraction form
    445.05/612.90 = 334.80/x
  3. Step 3: Cross multiply
    445.05x = 612.90 × 334.80
  4. Step 4: Simplify right side
    445.05x = 205,198.92
  5. Step 5: Solve for x
    x = 205,198.92/445.05
  6. Step 6: Final answer
    x = 461.07

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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.