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Finding the Fourth Proportional to 486.81, 671.69 and 276.99

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Solution

The fourth proportional to 486.81, 671.69 and 276.99 is: 382.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.81 : 671.69 = 276.99 : x
  2. Step 2: Convert to fraction form
    486.81/671.69 = 276.99/x
  3. Step 3: Cross multiply
    486.81x = 671.69 × 276.99
  4. Step 4: Simplify right side
    486.81x = 186,049.59
  5. Step 5: Solve for x
    x = 186,049.59/486.81
  6. Step 6: Final answer
    x = 382.18

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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.