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Finding the Fourth Proportional to 445.68, 668.56 and 121.04

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Solution

The fourth proportional to 445.68, 668.56 and 121.04 is: 181.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.68 : 668.56 = 121.04 : x
  2. Step 2: Convert to fraction form
    445.68/668.56 = 121.04/x
  3. Step 3: Cross multiply
    445.68x = 668.56 × 121.04
  4. Step 4: Simplify right side
    445.68x = 80,922.50
  5. Step 5: Solve for x
    x = 80,922.50/445.68
  6. Step 6: Final answer
    x = 181.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.