Home / 2,213.37-3,054.51-1,218.78

Finding the Fourth Proportional to 2,213.37, 3,054.51 and 1,218.78

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Solution

The fourth proportional to 2,213.37, 3,054.51 and 1,218.78 is: 1,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.37 : 3,054.51 = 1,218.78 : x
  2. Step 2: Convert to fraction form
    2,213.37/3,054.51 = 1,218.78/x
  3. Step 3: Cross multiply
    2,213.37x = 3,054.51 × 1,218.78
  4. Step 4: Simplify right side
    2,213.37x = 3,722,775.70
  5. Step 5: Solve for x
    x = 3,722,775.70/2,213.37
  6. Step 6: Final answer
    x = 1,681.95

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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.