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Finding the Fourth Proportional to 172.44, 257.40 and 159.48

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Solution

The fourth proportional to 172.44, 257.40 and 159.48 is: 238.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.44 : 257.40 = 159.48 : x
  2. Step 2: Convert to fraction form
    172.44/257.40 = 159.48/x
  3. Step 3: Cross multiply
    172.44x = 257.40 × 159.48
  4. Step 4: Simplify right side
    172.44x = 41,050.15
  5. Step 5: Solve for x
    x = 41,050.15/172.44
  6. Step 6: Final answer
    x = 238.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.