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Finding the Fourth Proportional to 446.73, 670.28 and 172.91

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Solution

The fourth proportional to 446.73, 670.28 and 172.91 is: 259.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.73 : 670.28 = 172.91 : x
  2. Step 2: Convert to fraction form
    446.73/670.28 = 172.91/x
  3. Step 3: Cross multiply
    446.73x = 670.28 × 172.91
  4. Step 4: Simplify right side
    446.73x = 115,893.90
  5. Step 5: Solve for x
    x = 115,893.90/446.73
  6. Step 6: Final answer
    x = 259.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.