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Finding the Fourth Proportional to 254.94, 351.70 and 172.10

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Solution

The fourth proportional to 254.94, 351.70 and 172.10 is: 237.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.94 : 351.70 = 172.10 : x
  2. Step 2: Convert to fraction form
    254.94/351.70 = 172.10/x
  3. Step 3: Cross multiply
    254.94x = 351.70 × 172.10
  4. Step 4: Simplify right side
    254.94x = 60,527.57
  5. Step 5: Solve for x
    x = 60,527.57/254.94
  6. Step 6: Final answer
    x = 237.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.