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Finding the Fourth Proportional to 483.79, 667.64 and 309.44

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Solution

The fourth proportional to 483.79, 667.64 and 309.44 is: 427.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.79 : 667.64 = 309.44 : x
  2. Step 2: Convert to fraction form
    483.79/667.64 = 309.44/x
  3. Step 3: Cross multiply
    483.79x = 667.64 × 309.44
  4. Step 4: Simplify right side
    483.79x = 206,594.52
  5. Step 5: Solve for x
    x = 206,594.52/483.79
  6. Step 6: Final answer
    x = 427.03

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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.