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Finding the Fourth Proportional to 445.28, 668.00 and 214.01

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Solution

The fourth proportional to 445.28, 668.00 and 214.01 is: 321.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.28 : 668.00 = 214.01 : x
  2. Step 2: Convert to fraction form
    445.28/668.00 = 214.01/x
  3. Step 3: Cross multiply
    445.28x = 668.00 × 214.01
  4. Step 4: Simplify right side
    445.28x = 142,955.88
  5. Step 5: Solve for x
    x = 142,955.88/445.28
  6. Step 6: Final answer
    x = 321.05

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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.