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Finding the Fourth Proportional to 277.21, 382.53 and 172.45

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Solution

The fourth proportional to 277.21, 382.53 and 172.45 is: 237.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.21 : 382.53 = 172.45 : x
  2. Step 2: Convert to fraction form
    277.21/382.53 = 172.45/x
  3. Step 3: Cross multiply
    277.21x = 382.53 × 172.45
  4. Step 4: Simplify right side
    277.21x = 65,967.30
  5. Step 5: Solve for x
    x = 65,967.30/277.21
  6. Step 6: Final answer
    x = 237.97

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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.