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Finding the Fourth Proportional to 489.73, 675.23 and 423.22

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Solution

The fourth proportional to 489.73, 675.23 and 423.22 is: 583.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.73 : 675.23 = 423.22 : x
  2. Step 2: Convert to fraction form
    489.73/675.23 = 423.22/x
  3. Step 3: Cross multiply
    489.73x = 675.23 × 423.22
  4. Step 4: Simplify right side
    489.73x = 285,767.46
  5. Step 5: Solve for x
    x = 285,767.46/489.73
  6. Step 6: Final answer
    x = 583.53

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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.