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Finding the Fourth Proportional to 446.07, 669.16 and 172.12

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Solution

The fourth proportional to 446.07, 669.16 and 172.12 is: 258.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.07 : 669.16 = 172.12 : x
  2. Step 2: Convert to fraction form
    446.07/669.16 = 172.12/x
  3. Step 3: Cross multiply
    446.07x = 669.16 × 172.12
  4. Step 4: Simplify right side
    446.07x = 115,171.61
  5. Step 5: Solve for x
    x = 115,171.61/446.07
  6. Step 6: Final answer
    x = 258.19

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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.