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Finding the Fourth Proportional to 414.72, 621.12 and 300.48

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Solution

The fourth proportional to 414.72, 621.12 and 300.48 is: 450.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.72 : 621.12 = 300.48 : x
  2. Step 2: Convert to fraction form
    414.72/621.12 = 300.48/x
  3. Step 3: Cross multiply
    414.72x = 621.12 × 300.48
  4. Step 4: Simplify right side
    414.72x = 186,634.14
  5. Step 5: Solve for x
    x = 186,634.14/414.72
  6. Step 6: Final answer
    x = 450.02

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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.