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Finding the Fourth Proportional to 486.97, 672.36 and 300.71

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Solution

The fourth proportional to 486.97, 672.36 and 300.71 is: 415.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.97 : 672.36 = 300.71 : x
  2. Step 2: Convert to fraction form
    486.97/672.36 = 300.71/x
  3. Step 3: Cross multiply
    486.97x = 672.36 × 300.71
  4. Step 4: Simplify right side
    486.97x = 202,185.93
  5. Step 5: Solve for x
    x = 202,185.93/486.97
  6. Step 6: Final answer
    x = 415.19

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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.