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Finding the Fourth Proportional to 454.45, 626.37 and 321.72

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Solution

The fourth proportional to 454.45, 626.37 and 321.72 is: 443.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.45 : 626.37 = 321.72 : x
  2. Step 2: Convert to fraction form
    454.45/626.37 = 321.72/x
  3. Step 3: Cross multiply
    454.45x = 626.37 × 321.72
  4. Step 4: Simplify right side
    454.45x = 201,515.76
  5. Step 5: Solve for x
    x = 201,515.76/454.45
  6. Step 6: Final answer
    x = 443.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.