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Finding the Fourth Proportional to 483.88, 667.56 and 309.19

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Solution

The fourth proportional to 483.88, 667.56 and 309.19 is: 426.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.88 : 667.56 = 309.19 : x
  2. Step 2: Convert to fraction form
    483.88/667.56 = 309.19/x
  3. Step 3: Cross multiply
    483.88x = 667.56 × 309.19
  4. Step 4: Simplify right side
    483.88x = 206,402.88
  5. Step 5: Solve for x
    x = 206,402.88/483.88
  6. Step 6: Final answer
    x = 426.56

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Double scale
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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.