Home / 2,685.08-4,027.58-1,385.80

Finding the Fourth Proportional to 2,685.08, 4,027.58 and 1,385.80

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Solution

The fourth proportional to 2,685.08, 4,027.58 and 1,385.80 is: 2,078.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.08 : 4,027.58 = 1,385.80 : x
  2. Step 2: Convert to fraction form
    2,685.08/4,027.58 = 1,385.80/x
  3. Step 3: Cross multiply
    2,685.08x = 4,027.58 × 1,385.80
  4. Step 4: Simplify right side
    2,685.08x = 5,581,420.36
  5. Step 5: Solve for x
    x = 5,581,420.36/2,685.08
  6. Step 6: Final answer
    x = 2,078.68

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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.