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Finding the Fourth Proportional to 486.91, 671.96 and 265.87

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Solution

The fourth proportional to 486.91, 671.96 and 265.87 is: 366.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.91 : 671.96 = 265.87 : x
  2. Step 2: Convert to fraction form
    486.91/671.96 = 265.87/x
  3. Step 3: Cross multiply
    486.91x = 671.96 × 265.87
  4. Step 4: Simplify right side
    486.91x = 178,654.36
  5. Step 5: Solve for x
    x = 178,654.36/486.91
  6. Step 6: Final answer
    x = 366.91

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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.