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Finding the Fourth Proportional to 300.35, 414.38 and 188.30

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Solution

The fourth proportional to 300.35, 414.38 and 188.30 is: 259.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.35 : 414.38 = 188.30 : x
  2. Step 2: Convert to fraction form
    300.35/414.38 = 188.30/x
  3. Step 3: Cross multiply
    300.35x = 414.38 × 188.30
  4. Step 4: Simplify right side
    300.35x = 78,026.81
  5. Step 5: Solve for x
    x = 78,026.81/300.35
  6. Step 6: Final answer
    x = 259.79

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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.