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Finding the Fourth Proportional to 489.80, 734.34 and 270.53

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Solution

The fourth proportional to 489.80, 734.34 and 270.53 is: 405.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.80 : 734.34 = 270.53 : x
  2. Step 2: Convert to fraction form
    489.80/734.34 = 270.53/x
  3. Step 3: Cross multiply
    489.80x = 734.34 × 270.53
  4. Step 4: Simplify right side
    489.80x = 198,657.33
  5. Step 5: Solve for x
    x = 198,657.33/489.80
  6. Step 6: Final answer
    x = 405.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.