Home / 3,586.86-5,380.30-1,121.70

Finding the Fourth Proportional to 3,586.86, 5,380.30 and 1,121.70

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Solution

The fourth proportional to 3,586.86, 5,380.30 and 1,121.70 is: 1,682.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,586.86 : 5,380.30 = 1,121.70 : x
  2. Step 2: Convert to fraction form
    3,586.86/5,380.30 = 1,121.70/x
  3. Step 3: Cross multiply
    3,586.86x = 5,380.30 × 1,121.70
  4. Step 4: Simplify right side
    3,586.86x = 6,035,059.53
  5. Step 5: Solve for x
    x = 6,035,059.53/3,586.86
  6. Step 6: Final answer
    x = 1,682.54

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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.