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Finding the Fourth Proportional to 414.21, 620.50 and 411.51

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Solution

The fourth proportional to 414.21, 620.50 and 411.51 is: 616.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.21 : 620.50 = 411.51 : x
  2. Step 2: Convert to fraction form
    414.21/620.50 = 411.51/x
  3. Step 3: Cross multiply
    414.21x = 620.50 × 411.51
  4. Step 4: Simplify right side
    414.21x = 255,341.96
  5. Step 5: Solve for x
    x = 255,341.96/414.21
  6. Step 6: Final answer
    x = 616.46

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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.