Home / 2,215.53-3,057.36-1,220.83

Finding the Fourth Proportional to 2,215.53, 3,057.36 and 1,220.83

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Solution

The fourth proportional to 2,215.53, 3,057.36 and 1,220.83 is: 1,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.53 : 3,057.36 = 1,220.83 : x
  2. Step 2: Convert to fraction form
    2,215.53/3,057.36 = 1,220.83/x
  3. Step 3: Cross multiply
    2,215.53x = 3,057.36 × 1,220.83
  4. Step 4: Simplify right side
    2,215.53x = 3,732,509.17
  5. Step 5: Solve for x
    x = 3,732,509.17/2,215.53
  6. Step 6: Final answer
    x = 1,684.70

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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.