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Finding the Fourth Proportional to 414.55, 620.61 and 356.37

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Solution

The fourth proportional to 414.55, 620.61 and 356.37 is: 533.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.55 : 620.61 = 356.37 : x
  2. Step 2: Convert to fraction form
    414.55/620.61 = 356.37/x
  3. Step 3: Cross multiply
    414.55x = 620.61 × 356.37
  4. Step 4: Simplify right side
    414.55x = 221,166.79
  5. Step 5: Solve for x
    x = 221,166.79/414.55
  6. Step 6: Final answer
    x = 533.51

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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.