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Finding the Fourth Proportional to 450, 675.12 and 193.44

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Solution

The fourth proportional to 450, 675.12 and 193.44 is: 290.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    450 : 675.12 = 193.44 : x
  2. Step 2: Convert to fraction form
    450/675.12 = 193.44/x
  3. Step 3: Cross multiply
    450x = 675.12 × 193.44
  4. Step 4: Simplify right side
    450x = 130,595.21
  5. Step 5: Solve for x
    x = 130,595.21/450
  6. Step 6: Final answer
    x = 290.21

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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.