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Finding the Fourth Proportional to 855.98, 1,181.28 and 483

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Solution

The fourth proportional to 855.98, 1,181.28 and 483 is: 666.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.98 : 1,181.28 = 483 : x
  2. Step 2: Convert to fraction form
    855.98/1,181.28 = 483/x
  3. Step 3: Cross multiply
    855.98x = 1,181.28 × 483
  4. Step 4: Simplify right side
    855.98x = 570,558.24
  5. Step 5: Solve for x
    x = 570,558.24/855.98
  6. Step 6: Final answer
    x = 666.56

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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.