Home / 2,215.28-3,057.12-1,220.60

Finding the Fourth Proportional to 2,215.28, 3,057.12 and 1,220.60

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Solution

The fourth proportional to 2,215.28, 3,057.12 and 1,220.60 is: 1,684.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.28 : 3,057.12 = 1,220.60 : x
  2. Step 2: Convert to fraction form
    2,215.28/3,057.12 = 1,220.60/x
  3. Step 3: Cross multiply
    2,215.28x = 3,057.12 × 1,220.60
  4. Step 4: Simplify right side
    2,215.28x = 3,731,520.67
  5. Step 5: Solve for x
    x = 3,731,520.67/2,215.28
  6. Step 6: Final answer
    x = 1,684.45

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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.