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Finding the Fourth Proportional to 611.65, 843.53 and 480.43

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Solution

The fourth proportional to 611.65, 843.53 and 480.43 is: 662.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.65 : 843.53 = 480.43 : x
  2. Step 2: Convert to fraction form
    611.65/843.53 = 480.43/x
  3. Step 3: Cross multiply
    611.65x = 843.53 × 480.43
  4. Step 4: Simplify right side
    611.65x = 405,258.32
  5. Step 5: Solve for x
    x = 405,258.32/611.65
  6. Step 6: Final answer
    x = 662.57

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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.