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Finding the Fourth Proportional to 277.96, 383.72 and 189.90

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Solution

The fourth proportional to 277.96, 383.72 and 189.90 is: 262.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.96 : 383.72 = 189.90 : x
  2. Step 2: Convert to fraction form
    277.96/383.72 = 189.90/x
  3. Step 3: Cross multiply
    277.96x = 383.72 × 189.90
  4. Step 4: Simplify right side
    277.96x = 72,868.55
  5. Step 5: Solve for x
    x = 72,868.55/277.96
  6. Step 6: Final answer
    x = 262.16

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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.