Home / 3,429.20-5,143.80-2,320.40

Finding the Fourth Proportional to 3,429.20, 5,143.80 and 2,320.40

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Solution

The fourth proportional to 3,429.20, 5,143.80 and 2,320.40 is: 3,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.20 : 5,143.80 = 2,320.40 : x
  2. Step 2: Convert to fraction form
    3,429.20/5,143.80 = 2,320.40/x
  3. Step 3: Cross multiply
    3,429.20x = 5,143.80 × 2,320.40
  4. Step 4: Simplify right side
    3,429.20x = 11,935,673.52
  5. Step 5: Solve for x
    x = 11,935,673.52/3,429.20
  6. Step 6: Final answer
    x = 3,480.60

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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.