Home / 1,909.20-2,865.60-1,635.60

Finding the Fourth Proportional to 1,909.20, 2,865.60 and 1,635.60

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Solution

The fourth proportional to 1,909.20, 2,865.60 and 1,635.60 is: 2,454.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.20 : 2,865.60 = 1,635.60 : x
  2. Step 2: Convert to fraction form
    1,909.20/2,865.60 = 1,635.60/x
  3. Step 3: Cross multiply
    1,909.20x = 2,865.60 × 1,635.60
  4. Step 4: Simplify right side
    1,909.20x = 4,686,975.36
  5. Step 5: Solve for x
    x = 4,686,975.36/1,909.20
  6. Step 6: Final answer
    x = 2,454.94

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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.