Home / 3,419.80-5,129.70-2,555.80

Finding the Fourth Proportional to 3,419.80, 5,129.70 and 2,555.80

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Solution

The fourth proportional to 3,419.80, 5,129.70 and 2,555.80 is: 3,833.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,419.80 : 5,129.70 = 2,555.80 : x
  2. Step 2: Convert to fraction form
    3,419.80/5,129.70 = 2,555.80/x
  3. Step 3: Cross multiply
    3,419.80x = 5,129.70 × 2,555.80
  4. Step 4: Simplify right side
    3,419.80x = 13,110,487.26
  5. Step 5: Solve for x
    x = 13,110,487.26/3,419.80
  6. Step 6: Final answer
    x = 3,833.70

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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.