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Finding the Fourth Proportional to 277.11, 382.47 and 172.30

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Solution

The fourth proportional to 277.11, 382.47 and 172.30 is: 237.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.11 : 382.47 = 172.30 : x
  2. Step 2: Convert to fraction form
    277.11/382.47 = 172.30/x
  3. Step 3: Cross multiply
    277.11x = 382.47 × 172.30
  4. Step 4: Simplify right side
    277.11x = 65,898.72
  5. Step 5: Solve for x
    x = 65,898.72/277.11
  6. Step 6: Final answer
    x = 237.81

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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.