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Finding the Fourth Proportional to 482.62, 665.41 and 394.00

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Solution

The fourth proportional to 482.62, 665.41 and 394.00 is: 543.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.62 : 665.41 = 394.00 : x
  2. Step 2: Convert to fraction form
    482.62/665.41 = 394.00/x
  3. Step 3: Cross multiply
    482.62x = 665.41 × 394.00
  4. Step 4: Simplify right side
    482.62x = 262,173.41
  5. Step 5: Solve for x
    x = 262,173.41/482.62
  6. Step 6: Final answer
    x = 543.23

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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.