Home / 1,177.50-1,766.25-311.81

Finding the Fourth Proportional to 1,177.50, 1,766.25 and 311.81

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Solution

The fourth proportional to 1,177.50, 1,766.25 and 311.81 is: 467.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.50 : 1,766.25 = 311.81 : x
  2. Step 2: Convert to fraction form
    1,177.50/1,766.25 = 311.81/x
  3. Step 3: Cross multiply
    1,177.50x = 1,766.25 × 311.81
  4. Step 4: Simplify right side
    1,177.50x = 550,738.83
  5. Step 5: Solve for x
    x = 550,738.83/1,177.50
  6. Step 6: Final answer
    x = 467.72

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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.