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Finding the Fourth Proportional to 486.02, 670.74 and 276.20

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Solution

The fourth proportional to 486.02, 670.74 and 276.20 is: 381.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.02 : 670.74 = 276.20 : x
  2. Step 2: Convert to fraction form
    486.02/670.74 = 276.20/x
  3. Step 3: Cross multiply
    486.02x = 670.74 × 276.20
  4. Step 4: Simplify right side
    486.02x = 185,255.03
  5. Step 5: Solve for x
    x = 185,255.03/486.02
  6. Step 6: Final answer
    x = 381.17

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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.