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Finding the Fourth Proportional to 461.25, 636.54 and 286.50

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Solution

The fourth proportional to 461.25, 636.54 and 286.50 is: 395.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.25 : 636.54 = 286.50 : x
  2. Step 2: Convert to fraction form
    461.25/636.54 = 286.50/x
  3. Step 3: Cross multiply
    461.25x = 636.54 × 286.50
  4. Step 4: Simplify right side
    461.25x = 182,368.71
  5. Step 5: Solve for x
    x = 182,368.71/461.25
  6. Step 6: Final answer
    x = 395.38

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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.