Home / 2,213.51-3,054.75-1,218.78

Finding the Fourth Proportional to 2,213.51, 3,054.75 and 1,218.78

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Solution

The fourth proportional to 2,213.51, 3,054.75 and 1,218.78 is: 1,681.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.51 : 3,054.75 = 1,218.78 : x
  2. Step 2: Convert to fraction form
    2,213.51/3,054.75 = 1,218.78/x
  3. Step 3: Cross multiply
    2,213.51x = 3,054.75 × 1,218.78
  4. Step 4: Simplify right side
    2,213.51x = 3,723,068.21
  5. Step 5: Solve for x
    x = 3,723,068.21/2,213.51
  6. Step 6: Final answer
    x = 1,681.97

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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.