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Finding the Fourth Proportional to 486.05, 670.74 and 276.27

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Solution

The fourth proportional to 486.05, 670.74 and 276.27 is: 381.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.05 : 670.74 = 276.27 : x
  2. Step 2: Convert to fraction form
    486.05/670.74 = 276.27/x
  3. Step 3: Cross multiply
    486.05x = 670.74 × 276.27
  4. Step 4: Simplify right side
    486.05x = 185,305.34
  5. Step 5: Solve for x
    x = 185,305.34/486.05
  6. Step 6: Final answer
    x = 381.25

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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.