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Finding the Fourth Proportional to 1,180.96, 1,771.08 and 949.30

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Solution

The fourth proportional to 1,180.96, 1,771.08 and 949.30 is: 1,423.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.96 : 1,771.08 = 949.30 : x
  2. Step 2: Convert to fraction form
    1,180.96/1,771.08 = 949.30/x
  3. Step 3: Cross multiply
    1,180.96x = 1,771.08 × 949.30
  4. Step 4: Simplify right side
    1,180.96x = 1,681,286.24
  5. Step 5: Solve for x
    x = 1,681,286.24/1,180.96
  6. Step 6: Final answer
    x = 1,423.66

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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.