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Finding the Fourth Proportional to 486.16, 670.91 and 276.34

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Solution

The fourth proportional to 486.16, 670.91 and 276.34 is: 381.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.16 : 670.91 = 276.34 : x
  2. Step 2: Convert to fraction form
    486.16/670.91 = 276.34/x
  3. Step 3: Cross multiply
    486.16x = 670.91 × 276.34
  4. Step 4: Simplify right side
    486.16x = 185,399.27
  5. Step 5: Solve for x
    x = 185,399.27/486.16
  6. Step 6: Final answer
    x = 381.35

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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.