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Finding the Fourth Proportional to 486.09, 670.66 and 276.25

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Solution

The fourth proportional to 486.09, 670.66 and 276.25 is: 381.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.09 : 670.66 = 276.25 : x
  2. Step 2: Convert to fraction form
    486.09/670.66 = 276.25/x
  3. Step 3: Cross multiply
    486.09x = 670.66 × 276.25
  4. Step 4: Simplify right side
    486.09x = 185,269.83
  5. Step 5: Solve for x
    x = 185,269.83/486.09
  6. Step 6: Final answer
    x = 381.14

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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.