Home / 2,215.16-3,057.01-1,220.51

Finding the Fourth Proportional to 2,215.16, 3,057.01 and 1,220.51

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Solution

The fourth proportional to 2,215.16, 3,057.01 and 1,220.51 is: 1,684.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.16 : 3,057.01 = 1,220.51 : x
  2. Step 2: Convert to fraction form
    2,215.16/3,057.01 = 1,220.51/x
  3. Step 3: Cross multiply
    2,215.16x = 3,057.01 × 1,220.51
  4. Step 4: Simplify right side
    2,215.16x = 3,731,115.87
  5. Step 5: Solve for x
    x = 3,731,115.87/2,215.16
  6. Step 6: Final answer
    x = 1,684.36

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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.