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Finding the Fourth Proportional to 461.51, 636.99 and 321.92

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Solution

The fourth proportional to 461.51, 636.99 and 321.92 is: 444.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.51 : 636.99 = 321.92 : x
  2. Step 2: Convert to fraction form
    461.51/636.99 = 321.92/x
  3. Step 3: Cross multiply
    461.51x = 636.99 × 321.92
  4. Step 4: Simplify right side
    461.51x = 205,059.82
  5. Step 5: Solve for x
    x = 205,059.82/461.51
  6. Step 6: Final answer
    x = 444.32

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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.