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Finding the Fourth Proportional to 172.14, 259.64 and 154.32

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Solution

The fourth proportional to 172.14, 259.64 and 154.32 is: 232.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.14 : 259.64 = 154.32 : x
  2. Step 2: Convert to fraction form
    172.14/259.64 = 154.32/x
  3. Step 3: Cross multiply
    172.14x = 259.64 × 154.32
  4. Step 4: Simplify right side
    172.14x = 40,066.87
  5. Step 5: Solve for x
    x = 40,066.87/172.14
  6. Step 6: Final answer
    x = 232.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.