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Finding the Fourth Proportional to 446.55, 669.75 and 172.59

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Solution

The fourth proportional to 446.55, 669.75 and 172.59 is: 258.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.55 : 669.75 = 172.59 : x
  2. Step 2: Convert to fraction form
    446.55/669.75 = 172.59/x
  3. Step 3: Cross multiply
    446.55x = 669.75 × 172.59
  4. Step 4: Simplify right side
    446.55x = 115,592.15
  5. Step 5: Solve for x
    x = 115,592.15/446.55
  6. Step 6: Final answer
    x = 258.86

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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.