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Finding the Fourth Proportional to 483.30, 667.09 and 308.62

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Solution

The fourth proportional to 483.30, 667.09 and 308.62 is: 425.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.30 : 667.09 = 308.62 : x
  2. Step 2: Convert to fraction form
    483.30/667.09 = 308.62/x
  3. Step 3: Cross multiply
    483.30x = 667.09 × 308.62
  4. Step 4: Simplify right side
    483.30x = 205,877.32
  5. Step 5: Solve for x
    x = 205,877.32/483.30
  6. Step 6: Final answer
    x = 425.98

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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.