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Finding the Fourth Proportional to 489.23, 733.87 and 272.65

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Solution

The fourth proportional to 489.23, 733.87 and 272.65 is: 408.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.23 : 733.87 = 272.65 : x
  2. Step 2: Convert to fraction form
    489.23/733.87 = 272.65/x
  3. Step 3: Cross multiply
    489.23x = 733.87 × 272.65
  4. Step 4: Simplify right side
    489.23x = 200,089.66
  5. Step 5: Solve for x
    x = 200,089.66/489.23
  6. Step 6: Final answer
    x = 408.99

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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.