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Finding the Fourth Proportional to 489.56, 675.27 and 427.32

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Solution

The fourth proportional to 489.56, 675.27 and 427.32 is: 589.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.56 : 675.27 = 427.32 : x
  2. Step 2: Convert to fraction form
    489.56/675.27 = 427.32/x
  3. Step 3: Cross multiply
    489.56x = 675.27 × 427.32
  4. Step 4: Simplify right side
    489.56x = 288,556.38
  5. Step 5: Solve for x
    x = 288,556.38/489.56
  6. Step 6: Final answer
    x = 589.43

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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.