Home / 3,210.50-4,789.49-3,121.20

Finding the Fourth Proportional to 3,210.50, 4,789.49 and 3,121.20

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Solution

The fourth proportional to 3,210.50, 4,789.49 and 3,121.20 is: 4,656.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,210.50 : 4,789.49 = 3,121.20 : x
  2. Step 2: Convert to fraction form
    3,210.50/4,789.49 = 3,121.20/x
  3. Step 3: Cross multiply
    3,210.50x = 4,789.49 × 3,121.20
  4. Step 4: Simplify right side
    3,210.50x = 14,948,940.58
  5. Step 5: Solve for x
    x = 14,948,940.58/3,210.50
  6. Step 6: Final answer
    x = 4,656.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.