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Finding the Fourth Proportional to 483.79, 667.38 and 287.23

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Solution

The fourth proportional to 483.79, 667.38 and 287.23 is: 396.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.79 : 667.38 = 287.23 : x
  2. Step 2: Convert to fraction form
    483.79/667.38 = 287.23/x
  3. Step 3: Cross multiply
    483.79x = 667.38 × 287.23
  4. Step 4: Simplify right side
    483.79x = 191,688.22
  5. Step 5: Solve for x
    x = 191,688.22/483.79
  6. Step 6: Final answer
    x = 396.23

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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.