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Finding the Fourth Proportional to 414.20, 620.76 and 277.04

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Solution

The fourth proportional to 414.20, 620.76 and 277.04 is: 415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.20 : 620.76 = 277.04 : x
  2. Step 2: Convert to fraction form
    414.20/620.76 = 277.04/x
  3. Step 3: Cross multiply
    414.20x = 620.76 × 277.04
  4. Step 4: Simplify right side
    414.20x = 171,975.35
  5. Step 5: Solve for x
    x = 171,975.35/414.20
  6. Step 6: Final answer
    x = 415.20

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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.