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Finding the Fourth Proportional to 445.36, 668.06 and 214.45

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Solution

The fourth proportional to 445.36, 668.06 and 214.45 is: 321.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.36 : 668.06 = 214.45 : x
  2. Step 2: Convert to fraction form
    445.36/668.06 = 214.45/x
  3. Step 3: Cross multiply
    445.36x = 668.06 × 214.45
  4. Step 4: Simplify right side
    445.36x = 143,265.47
  5. Step 5: Solve for x
    x = 143,265.47/445.36
  6. Step 6: Final answer
    x = 321.68

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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.