Home / 2,215.68-3,057.30-1,331.40

Finding the Fourth Proportional to 2,215.68, 3,057.30 and 1,331.40

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Solution

The fourth proportional to 2,215.68, 3,057.30 and 1,331.40 is: 1,837.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.68 : 3,057.30 = 1,331.40 : x
  2. Step 2: Convert to fraction form
    2,215.68/3,057.30 = 1,331.40/x
  3. Step 3: Cross multiply
    2,215.68x = 3,057.30 × 1,331.40
  4. Step 4: Simplify right side
    2,215.68x = 4,070,489.22
  5. Step 5: Solve for x
    x = 4,070,489.22/2,215.68
  6. Step 6: Final answer
    x = 1,837.13

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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.