Home / 3,430.80-5,146.56-2,131.20

Finding the Fourth Proportional to 3,430.80, 5,146.56 and 2,131.20

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Solution

The fourth proportional to 3,430.80, 5,146.56 and 2,131.20 is: 3,197.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.80 : 5,146.56 = 2,131.20 : x
  2. Step 2: Convert to fraction form
    3,430.80/5,146.56 = 2,131.20/x
  3. Step 3: Cross multiply
    3,430.80x = 5,146.56 × 2,131.20
  4. Step 4: Simplify right side
    3,430.80x = 10,968,348.67
  5. Step 5: Solve for x
    x = 10,968,348.67/3,430.80
  6. Step 6: Final answer
    x = 3,197.02

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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.