Home / 3,420.80-5,129.37-1,775.69

Finding the Fourth Proportional to 3,420.80, 5,129.37 and 1,775.69

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Solution

The fourth proportional to 3,420.80, 5,129.37 and 1,775.69 is: 2,662.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.80 : 5,129.37 = 1,775.69 : x
  2. Step 2: Convert to fraction form
    3,420.80/5,129.37 = 1,775.69/x
  3. Step 3: Cross multiply
    3,420.80x = 5,129.37 × 1,775.69
  4. Step 4: Simplify right side
    3,420.80x = 9,108,145.37
  5. Step 5: Solve for x
    x = 9,108,145.37/3,420.80
  6. Step 6: Final answer
    x = 2,662.58

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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.