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Finding the Fourth Proportional to 414.44, 620.72 and 355.28

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Solution

The fourth proportional to 414.44, 620.72 and 355.28 is: 532.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.44 : 620.72 = 355.28 : x
  2. Step 2: Convert to fraction form
    414.44/620.72 = 355.28/x
  3. Step 3: Cross multiply
    414.44x = 620.72 × 355.28
  4. Step 4: Simplify right side
    414.44x = 220,529.40
  5. Step 5: Solve for x
    x = 220,529.40/414.44
  6. Step 6: Final answer
    x = 532.11

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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.