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Finding the Fourth Proportional to 482.53, 665.14 and 394.38

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Solution

The fourth proportional to 482.53, 665.14 and 394.38 is: 543.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.53 : 665.14 = 394.38 : x
  2. Step 2: Convert to fraction form
    482.53/665.14 = 394.38/x
  3. Step 3: Cross multiply
    482.53x = 665.14 × 394.38
  4. Step 4: Simplify right side
    482.53x = 262,317.91
  5. Step 5: Solve for x
    x = 262,317.91/482.53
  6. Step 6: Final answer
    x = 543.63

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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.