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Finding the Fourth Proportional to 486.75, 671.60 and 276.89

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Solution

The fourth proportional to 486.75, 671.60 and 276.89 is: 382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.75 : 671.60 = 276.89 : x
  2. Step 2: Convert to fraction form
    486.75/671.60 = 276.89/x
  3. Step 3: Cross multiply
    486.75x = 671.60 × 276.89
  4. Step 4: Simplify right side
    486.75x = 185,959.32
  5. Step 5: Solve for x
    x = 185,959.32/486.75
  6. Step 6: Final answer
    x = 382.04

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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.