Home / 2,148.03-3,222.36-687.33

Finding the Fourth Proportional to 2,148.03, 3,222.36 and 687.33

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Solution

The fourth proportional to 2,148.03, 3,222.36 and 687.33 is: 1,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.03 : 3,222.36 = 687.33 : x
  2. Step 2: Convert to fraction form
    2,148.03/3,222.36 = 687.33/x
  3. Step 3: Cross multiply
    2,148.03x = 3,222.36 × 687.33
  4. Step 4: Simplify right side
    2,148.03x = 2,214,824.70
  5. Step 5: Solve for x
    x = 2,214,824.70/2,148.03
  6. Step 6: Final answer
    x = 1,031.10

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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.