Home / 2,219.80-3,063.30-1,225.12

Finding the Fourth Proportional to 2,219.80, 3,063.30 and 1,225.12

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Solution

The fourth proportional to 2,219.80, 3,063.30 and 1,225.12 is: 1,690.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.80 : 3,063.30 = 1,225.12 : x
  2. Step 2: Convert to fraction form
    2,219.80/3,063.30 = 1,225.12/x
  3. Step 3: Cross multiply
    2,219.80x = 3,063.30 × 1,225.12
  4. Step 4: Simplify right side
    2,219.80x = 3,752,894.78
  5. Step 5: Solve for x
    x = 3,752,894.78/2,219.80
  6. Step 6: Final answer
    x = 1,690.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.