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Finding the Fourth Proportional to 423.48, 636.44 and 394.59

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Solution

The fourth proportional to 423.48, 636.44 and 394.59 is: 593.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.48 : 636.44 = 394.59 : x
  2. Step 2: Convert to fraction form
    423.48/636.44 = 394.59/x
  3. Step 3: Cross multiply
    423.48x = 636.44 × 394.59
  4. Step 4: Simplify right side
    423.48x = 251,130.89
  5. Step 5: Solve for x
    x = 251,130.89/423.48
  6. Step 6: Final answer
    x = 593.02

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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.