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Finding the Fourth Proportional to 378.60, 522.26 and 223.32

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Solution

The fourth proportional to 378.60, 522.26 and 223.32 is: 308.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.60 : 522.26 = 223.32 : x
  2. Step 2: Convert to fraction form
    378.60/522.26 = 223.32/x
  3. Step 3: Cross multiply
    378.60x = 522.26 × 223.32
  4. Step 4: Simplify right side
    378.60x = 116,631.10
  5. Step 5: Solve for x
    x = 116,631.10/378.60
  6. Step 6: Final answer
    x = 308.06

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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.