Home / 3,412.50-5,118.78-1,221.60

Finding the Fourth Proportional to 3,412.50, 5,118.78 and 1,221.60

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Solution

The fourth proportional to 3,412.50, 5,118.78 and 1,221.60 is: 1,832.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.50 : 5,118.78 = 1,221.60 : x
  2. Step 2: Convert to fraction form
    3,412.50/5,118.78 = 1,221.60/x
  3. Step 3: Cross multiply
    3,412.50x = 5,118.78 × 1,221.60
  4. Step 4: Simplify right side
    3,412.50x = 6,253,101.65
  5. Step 5: Solve for x
    x = 6,253,101.65/3,412.50
  6. Step 6: Final answer
    x = 1,832.41

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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.