Home / 4,218.40-5,781.80-4,189.60

Finding the Fourth Proportional to 4,218.40, 5,781.80 and 4,189.60

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Solution

The fourth proportional to 4,218.40, 5,781.80 and 4,189.60 is: 5,742.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,218.40 : 5,781.80 = 4,189.60 : x
  2. Step 2: Convert to fraction form
    4,218.40/5,781.80 = 4,189.60/x
  3. Step 3: Cross multiply
    4,218.40x = 5,781.80 × 4,189.60
  4. Step 4: Simplify right side
    4,218.40x = 24,223,429.28
  5. Step 5: Solve for x
    x = 24,223,429.28/4,218.40
  6. Step 6: Final answer
    x = 5,742.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.