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Finding the Fourth Proportional to 418.64, 626.60 and 223.36

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Solution

The fourth proportional to 418.64, 626.60 and 223.36 is: 334.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.64 : 626.60 = 223.36 : x
  2. Step 2: Convert to fraction form
    418.64/626.60 = 223.36/x
  3. Step 3: Cross multiply
    418.64x = 626.60 × 223.36
  4. Step 4: Simplify right side
    418.64x = 139,954.69
  5. Step 5: Solve for x
    x = 139,954.69/418.64
  6. Step 6: Final answer
    x = 334.31

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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.