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Finding the Fourth Proportional to 483.85, 667.60 and 309.07

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Solution

The fourth proportional to 483.85, 667.60 and 309.07 is: 426.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.85 : 667.60 = 309.07 : x
  2. Step 2: Convert to fraction form
    483.85/667.60 = 309.07/x
  3. Step 3: Cross multiply
    483.85x = 667.60 × 309.07
  4. Step 4: Simplify right side
    483.85x = 206,335.13
  5. Step 5: Solve for x
    x = 206,335.13/483.85
  6. Step 6: Final answer
    x = 426.44

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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.