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Finding the Fourth Proportional to 483.04, 665.94 and 394.20

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Solution

The fourth proportional to 483.04, 665.94 and 394.20 is: 543.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.04 : 665.94 = 394.20 : x
  2. Step 2: Convert to fraction form
    483.04/665.94 = 394.20/x
  3. Step 3: Cross multiply
    483.04x = 665.94 × 394.20
  4. Step 4: Simplify right side
    483.04x = 262,513.55
  5. Step 5: Solve for x
    x = 262,513.55/483.04
  6. Step 6: Final answer
    x = 543.46

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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.