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Finding the Fourth Proportional to 489.76, 733.76 and 270.16

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Solution

The fourth proportional to 489.76, 733.76 and 270.16 is: 404.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.76 : 733.76 = 270.16 : x
  2. Step 2: Convert to fraction form
    489.76/733.76 = 270.16/x
  3. Step 3: Cross multiply
    489.76x = 733.76 × 270.16
  4. Step 4: Simplify right side
    489.76x = 198,232.60
  5. Step 5: Solve for x
    x = 198,232.60/489.76
  6. Step 6: Final answer
    x = 404.75

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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.