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Finding the Fourth Proportional to 481.65, 720.85 and 275.91

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Solution

The fourth proportional to 481.65, 720.85 and 275.91 is: 412.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.65 : 720.85 = 275.91 : x
  2. Step 2: Convert to fraction form
    481.65/720.85 = 275.91/x
  3. Step 3: Cross multiply
    481.65x = 720.85 × 275.91
  4. Step 4: Simplify right side
    481.65x = 198,886.85
  5. Step 5: Solve for x
    x = 198,886.85/481.65
  6. Step 6: Final answer
    x = 412.93

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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.