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Finding the Fourth Proportional to 2,745.80, 4,118.67 and 693.80

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Solution

The fourth proportional to 2,745.80, 4,118.67 and 693.80 is: 1,040.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,745.80 : 4,118.67 = 693.80 : x
  2. Step 2: Convert to fraction form
    2,745.80/4,118.67 = 693.80/x
  3. Step 3: Cross multiply
    2,745.80x = 4,118.67 × 693.80
  4. Step 4: Simplify right side
    2,745.80x = 2,857,533.25
  5. Step 5: Solve for x
    x = 2,857,533.25/2,745.80
  6. Step 6: Final answer
    x = 1,040.69

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1.5x scale

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.