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Finding the Fourth Proportional to 417.21, 626.18 and 222.37

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Solution

The fourth proportional to 417.21, 626.18 and 222.37 is: 333.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.21 : 626.18 = 222.37 : x
  2. Step 2: Convert to fraction form
    417.21/626.18 = 222.37/x
  3. Step 3: Cross multiply
    417.21x = 626.18 × 222.37
  4. Step 4: Simplify right side
    417.21x = 139,242.22
  5. Step 5: Solve for x
    x = 139,242.22/417.21
  6. Step 6: Final answer
    x = 333.75

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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.