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Finding the Fourth Proportional to 602.70, 828.93 and 489.34

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Solution

The fourth proportional to 602.70, 828.93 and 489.34 is: 673.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.70 : 828.93 = 489.34 : x
  2. Step 2: Convert to fraction form
    602.70/828.93 = 489.34/x
  3. Step 3: Cross multiply
    602.70x = 828.93 × 489.34
  4. Step 4: Simplify right side
    602.70x = 405,628.61
  5. Step 5: Solve for x
    x = 405,628.61/602.70
  6. Step 6: Final answer
    x = 673.02

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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.