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Finding the Fourth Proportional to 461.86, 636.93 and 287.26

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Solution

The fourth proportional to 461.86, 636.93 and 287.26 is: 396.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.86 : 636.93 = 287.26 : x
  2. Step 2: Convert to fraction form
    461.86/636.93 = 287.26/x
  3. Step 3: Cross multiply
    461.86x = 636.93 × 287.26
  4. Step 4: Simplify right side
    461.86x = 182,964.51
  5. Step 5: Solve for x
    x = 182,964.51/461.86
  6. Step 6: Final answer
    x = 396.15

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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.