Home / 2,219.49-3,062.85-1,211.20

Finding the Fourth Proportional to 2,219.49, 3,062.85 and 1,211.20

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Solution

The fourth proportional to 2,219.49, 3,062.85 and 1,211.20 is: 1,671.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.49 : 3,062.85 = 1,211.20 : x
  2. Step 2: Convert to fraction form
    2,219.49/3,062.85 = 1,211.20/x
  3. Step 3: Cross multiply
    2,219.49x = 3,062.85 × 1,211.20
  4. Step 4: Simplify right side
    2,219.49x = 3,709,723.92
  5. Step 5: Solve for x
    x = 3,709,723.92/2,219.49
  6. Step 6: Final answer
    x = 1,671.43

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Half scale
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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.