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Finding the Fourth Proportional to 486.43, 670.13 and 338.81

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Solution

The fourth proportional to 486.43, 670.13 and 338.81 is: 466.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.43 : 670.13 = 338.81 : x
  2. Step 2: Convert to fraction form
    486.43/670.13 = 338.81/x
  3. Step 3: Cross multiply
    486.43x = 670.13 × 338.81
  4. Step 4: Simplify right side
    486.43x = 227,046.75
  5. Step 5: Solve for x
    x = 227,046.75/486.43
  6. Step 6: Final answer
    x = 466.76

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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.