Home / 3,320.20-4,980.26-855.01

Finding the Fourth Proportional to 3,320.20, 4,980.26 and 855.01

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Solution

The fourth proportional to 3,320.20, 4,980.26 and 855.01 is: 1,282.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.20 : 4,980.26 = 855.01 : x
  2. Step 2: Convert to fraction form
    3,320.20/4,980.26 = 855.01/x
  3. Step 3: Cross multiply
    3,320.20x = 4,980.26 × 855.01
  4. Step 4: Simplify right side
    3,320.20x = 4,258,161.79
  5. Step 5: Solve for x
    x = 4,258,161.79/3,320.20
  6. Step 6: Final answer
    x = 1,282.50

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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.