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Finding the Fourth Proportional to 414.28, 620.28 and 304.72

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Solution

The fourth proportional to 414.28, 620.28 and 304.72 is: 456.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.28 : 620.28 = 304.72 : x
  2. Step 2: Convert to fraction form
    414.28/620.28 = 304.72/x
  3. Step 3: Cross multiply
    414.28x = 620.28 × 304.72
  4. Step 4: Simplify right side
    414.28x = 189,011.72
  5. Step 5: Solve for x
    x = 189,011.72/414.28
  6. Step 6: Final answer
    x = 456.24

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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.