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Finding the Fourth Proportional to 1,177.29, 1,766.07 and 311.67

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Solution

The fourth proportional to 1,177.29, 1,766.07 and 311.67 is: 467.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.29 : 1,766.07 = 311.67 : x
  2. Step 2: Convert to fraction form
    1,177.29/1,766.07 = 311.67/x
  3. Step 3: Cross multiply
    1,177.29x = 1,766.07 × 311.67
  4. Step 4: Simplify right side
    1,177.29x = 550,431.04
  5. Step 5: Solve for x
    x = 550,431.04/1,177.29
  6. Step 6: Final answer
    x = 467.54

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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.