Home / 3,360.40-5,040.60-2,129.20

Finding the Fourth Proportional to 3,360.40, 5,040.60 and 2,129.20

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Solution

The fourth proportional to 3,360.40, 5,040.60 and 2,129.20 is: 3,193.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,360.40 : 5,040.60 = 2,129.20 : x
  2. Step 2: Convert to fraction form
    3,360.40/5,040.60 = 2,129.20/x
  3. Step 3: Cross multiply
    3,360.40x = 5,040.60 × 2,129.20
  4. Step 4: Simplify right side
    3,360.40x = 10,732,445.52
  5. Step 5: Solve for x
    x = 10,732,445.52/3,360.40
  6. Step 6: Final answer
    x = 3,193.80

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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.