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Finding the Fourth Proportional to 451.31, 622.89 and 304.02

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Solution

The fourth proportional to 451.31, 622.89 and 304.02 is: 419.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.31 : 622.89 = 304.02 : x
  2. Step 2: Convert to fraction form
    451.31/622.89 = 304.02/x
  3. Step 3: Cross multiply
    451.31x = 622.89 × 304.02
  4. Step 4: Simplify right side
    451.31x = 189,371.02
  5. Step 5: Solve for x
    x = 189,371.02/451.31
  6. Step 6: Final answer
    x = 419.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.