Home / 3,122.53-4,684.70-1,390.75

Finding the Fourth Proportional to 3,122.53, 4,684.70 and 1,390.75

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Solution

The fourth proportional to 3,122.53, 4,684.70 and 1,390.75 is: 2,086.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.53 : 4,684.70 = 1,390.75 : x
  2. Step 2: Convert to fraction form
    3,122.53/4,684.70 = 1,390.75/x
  3. Step 3: Cross multiply
    3,122.53x = 4,684.70 × 1,390.75
  4. Step 4: Simplify right side
    3,122.53x = 6,515,227.86
  5. Step 5: Solve for x
    x = 6,515,227.86/3,122.53
  6. Step 6: Final answer
    x = 2,086.52

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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.