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Finding the Fourth Proportional to 599.80, 828.11 and 489.54

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Solution

The fourth proportional to 599.80, 828.11 and 489.54 is: 675.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    599.80 : 828.11 = 489.54 : x
  2. Step 2: Convert to fraction form
    599.80/828.11 = 489.54/x
  3. Step 3: Cross multiply
    599.80x = 828.11 × 489.54
  4. Step 4: Simplify right side
    599.80x = 405,390.52
  5. Step 5: Solve for x
    x = 405,390.52/599.80
  6. Step 6: Final answer
    x = 675.88

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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.