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Finding the Fourth Proportional to 452.27, 678.75 and 221.29

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Solution

The fourth proportional to 452.27, 678.75 and 221.29 is: 332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.27 : 678.75 = 221.29 : x
  2. Step 2: Convert to fraction form
    452.27/678.75 = 221.29/x
  3. Step 3: Cross multiply
    452.27x = 678.75 × 221.29
  4. Step 4: Simplify right side
    452.27x = 150,200.59
  5. Step 5: Solve for x
    x = 150,200.59/452.27
  6. Step 6: Final answer
    x = 332.10

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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.