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Finding the Fourth Proportional to 461.48, 636.59 and 321.35

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Solution

The fourth proportional to 461.48, 636.59 and 321.35 is: 443.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.48 : 636.59 = 321.35 : x
  2. Step 2: Convert to fraction form
    461.48/636.59 = 321.35/x
  3. Step 3: Cross multiply
    461.48x = 636.59 × 321.35
  4. Step 4: Simplify right side
    461.48x = 204,565.82
  5. Step 5: Solve for x
    x = 204,565.82/461.48
  6. Step 6: Final answer
    x = 443.29

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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.