Home / 3,215.80-4,816.50-1,979.20

Finding the Fourth Proportional to 3,215.80, 4,816.50 and 1,979.20

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Solution

The fourth proportional to 3,215.80, 4,816.50 and 1,979.20 is: 2,964.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.80 : 4,816.50 = 1,979.20 : x
  2. Step 2: Convert to fraction form
    3,215.80/4,816.50 = 1,979.20/x
  3. Step 3: Cross multiply
    3,215.80x = 4,816.50 × 1,979.20
  4. Step 4: Simplify right side
    3,215.80x = 9,532,816.80
  5. Step 5: Solve for x
    x = 9,532,816.80/3,215.80
  6. Step 6: Final answer
    x = 2,964.37

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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.