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Finding the Fourth Proportional to 414.05, 620.87 and 260.09

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Solution

The fourth proportional to 414.05, 620.87 and 260.09 is: 390.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.05 : 620.87 = 260.09 : x
  2. Step 2: Convert to fraction form
    414.05/620.87 = 260.09/x
  3. Step 3: Cross multiply
    414.05x = 620.87 × 260.09
  4. Step 4: Simplify right side
    414.05x = 161,478.26
  5. Step 5: Solve for x
    x = 161,478.26/414.05
  6. Step 6: Final answer
    x = 390.00

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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.