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Finding the Fourth Proportional to 461.15, 636.08 and 286.48

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Solution

The fourth proportional to 461.15, 636.08 and 286.48 is: 395.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.15 : 636.08 = 286.48 : x
  2. Step 2: Convert to fraction form
    461.15/636.08 = 286.48/x
  3. Step 3: Cross multiply
    461.15x = 636.08 × 286.48
  4. Step 4: Simplify right side
    461.15x = 182,224.20
  5. Step 5: Solve for x
    x = 182,224.20/461.15
  6. Step 6: Final answer
    x = 395.15

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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.