Home / 3,145.35-4,340.70-1,729.20

Finding the Fourth Proportional to 3,145.35, 4,340.70 and 1,729.20

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Solution

The fourth proportional to 3,145.35, 4,340.70 and 1,729.20 is: 2,386.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.35 : 4,340.70 = 1,729.20 : x
  2. Step 2: Convert to fraction form
    3,145.35/4,340.70 = 1,729.20/x
  3. Step 3: Cross multiply
    3,145.35x = 4,340.70 × 1,729.20
  4. Step 4: Simplify right side
    3,145.35x = 7,505,938.44
  5. Step 5: Solve for x
    x = 7,505,938.44/3,145.35
  6. Step 6: Final answer
    x = 2,386.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.