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Finding the Fourth Proportional to 461.19, 636.92 and 395.31

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Solution

The fourth proportional to 461.19, 636.92 and 395.31 is: 545.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.19 : 636.92 = 395.31 : x
  2. Step 2: Convert to fraction form
    461.19/636.92 = 395.31/x
  3. Step 3: Cross multiply
    461.19x = 636.92 × 395.31
  4. Step 4: Simplify right side
    461.19x = 251,778.87
  5. Step 5: Solve for x
    x = 251,778.87/461.19
  6. Step 6: Final answer
    x = 545.93

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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.