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Finding the Fourth Proportional to 486.91, 671.93 and 300.31

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Solution

The fourth proportional to 486.91, 671.93 and 300.31 is: 414.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.91 : 671.93 = 300.31 : x
  2. Step 2: Convert to fraction form
    486.91/671.93 = 300.31/x
  3. Step 3: Cross multiply
    486.91x = 671.93 × 300.31
  4. Step 4: Simplify right side
    486.91x = 201,785.24
  5. Step 5: Solve for x
    x = 201,785.24/486.91
  6. Step 6: Final answer
    x = 414.42

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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.