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Finding the Fourth Proportional to 443.21, 664.55 and 183.39

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Solution

The fourth proportional to 443.21, 664.55 and 183.39 is: 274.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.21 : 664.55 = 183.39 : x
  2. Step 2: Convert to fraction form
    443.21/664.55 = 183.39/x
  3. Step 3: Cross multiply
    443.21x = 664.55 × 183.39
  4. Step 4: Simplify right side
    443.21x = 121,871.82
  5. Step 5: Solve for x
    x = 121,871.82/443.21
  6. Step 6: Final answer
    x = 274.98

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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.