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Finding the Fourth Proportional to 254.48, 381.53 and 172.01

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Solution

The fourth proportional to 254.48, 381.53 and 172.01 is: 257.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.48 : 381.53 = 172.01 : x
  2. Step 2: Convert to fraction form
    254.48/381.53 = 172.01/x
  3. Step 3: Cross multiply
    254.48x = 381.53 × 172.01
  4. Step 4: Simplify right side
    254.48x = 65,624.21
  5. Step 5: Solve for x
    x = 65,624.21/254.48
  6. Step 6: Final answer
    x = 257.88

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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.