Home / 2,215.40-3,315.90-1,725.80

Finding the Fourth Proportional to 2,215.40, 3,315.90 and 1,725.80

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Solution

The fourth proportional to 2,215.40, 3,315.90 and 1,725.80 is: 2,583.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.40 : 3,315.90 = 1,725.80 : x
  2. Step 2: Convert to fraction form
    2,215.40/3,315.90 = 1,725.80/x
  3. Step 3: Cross multiply
    2,215.40x = 3,315.90 × 1,725.80
  4. Step 4: Simplify right side
    2,215.40x = 5,722,580.22
  5. Step 5: Solve for x
    x = 5,722,580.22/2,215.40
  6. Step 6: Final answer
    x = 2,583.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.