Home / 2,212.95-3,053.76-1,218.21

Finding the Fourth Proportional to 2,212.95, 3,053.76 and 1,218.21

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Solution

The fourth proportional to 2,212.95, 3,053.76 and 1,218.21 is: 1,681.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.95 : 3,053.76 = 1,218.21 : x
  2. Step 2: Convert to fraction form
    2,212.95/3,053.76 = 1,218.21/x
  3. Step 3: Cross multiply
    2,212.95x = 3,053.76 × 1,218.21
  4. Step 4: Simplify right side
    2,212.95x = 3,720,105.70
  5. Step 5: Solve for x
    x = 3,720,105.70/2,212.95
  6. Step 6: Final answer
    x = 1,681.06

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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.