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Finding the Fourth Proportional to 172.63, 259.26 and 155.02

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Solution

The fourth proportional to 172.63, 259.26 and 155.02 is: 232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.63 : 259.26 = 155.02 : x
  2. Step 2: Convert to fraction form
    172.63/259.26 = 155.02/x
  3. Step 3: Cross multiply
    172.63x = 259.26 × 155.02
  4. Step 4: Simplify right side
    172.63x = 40,190.49
  5. Step 5: Solve for x
    x = 40,190.49/172.63
  6. Step 6: Final answer
    x = 232.81

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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.