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Finding the Fourth Proportional to 426.63, 636.82 and 395.33

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Solution

The fourth proportional to 426.63, 636.82 and 395.33 is: 590.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.63 : 636.82 = 395.33 : x
  2. Step 2: Convert to fraction form
    426.63/636.82 = 395.33/x
  3. Step 3: Cross multiply
    426.63x = 636.82 × 395.33
  4. Step 4: Simplify right side
    426.63x = 251,749.88
  5. Step 5: Solve for x
    x = 251,749.88/426.63
  6. Step 6: Final answer
    x = 590.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.