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Finding the Fourth Proportional to 489.26, 674.98 and 427.09

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Solution

The fourth proportional to 489.26, 674.98 and 427.09 is: 589.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.26 : 674.98 = 427.09 : x
  2. Step 2: Convert to fraction form
    489.26/674.98 = 427.09/x
  3. Step 3: Cross multiply
    489.26x = 674.98 × 427.09
  4. Step 4: Simplify right side
    489.26x = 288,278.12
  5. Step 5: Solve for x
    x = 288,278.12/489.26
  6. Step 6: Final answer
    x = 589.22

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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.