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Finding the Fourth Proportional to 323.79, 486.15 and 283.69

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Solution

The fourth proportional to 323.79, 486.15 and 283.69 is: 425.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.79 : 486.15 = 283.69 : x
  2. Step 2: Convert to fraction form
    323.79/486.15 = 283.69/x
  3. Step 3: Cross multiply
    323.79x = 486.15 × 283.69
  4. Step 4: Simplify right side
    323.79x = 137,915.44
  5. Step 5: Solve for x
    x = 137,915.44/323.79
  6. Step 6: Final answer
    x = 425.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.