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Finding the Fourth Proportional to 277.81, 383.57 and 172.92

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Solution

The fourth proportional to 277.81, 383.57 and 172.92 is: 238.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.81 : 383.57 = 172.92 : x
  2. Step 2: Convert to fraction form
    277.81/383.57 = 172.92/x
  3. Step 3: Cross multiply
    277.81x = 383.57 × 172.92
  4. Step 4: Simplify right side
    277.81x = 66,325.99
  5. Step 5: Solve for x
    x = 66,325.99/277.81
  6. Step 6: Final answer
    x = 238.75

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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.