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Finding the Fourth Proportional to 342.58, 513.20 and 226.68

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Solution

The fourth proportional to 342.58, 513.20 and 226.68 is: 339.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.58 : 513.20 = 226.68 : x
  2. Step 2: Convert to fraction form
    342.58/513.20 = 226.68/x
  3. Step 3: Cross multiply
    342.58x = 513.20 × 226.68
  4. Step 4: Simplify right side
    342.58x = 116,334.72
  5. Step 5: Solve for x
    x = 116,334.72/342.58
  6. Step 6: Final answer
    x = 339.58

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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.