Home / 2,215.32-3,057.10-1,220.58

Finding the Fourth Proportional to 2,215.32, 3,057.10 and 1,220.58

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Solution

The fourth proportional to 2,215.32, 3,057.10 and 1,220.58 is: 1,684.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.32 : 3,057.10 = 1,220.58 : x
  2. Step 2: Convert to fraction form
    2,215.32/3,057.10 = 1,220.58/x
  3. Step 3: Cross multiply
    2,215.32x = 3,057.10 × 1,220.58
  4. Step 4: Simplify right side
    2,215.32x = 3,731,435.12
  5. Step 5: Solve for x
    x = 3,731,435.12/2,215.32
  6. Step 6: Final answer
    x = 1,684.38

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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.