Home / 2,645.50-3,968.96-1,328.90

Finding the Fourth Proportional to 2,645.50, 3,968.96 and 1,328.90

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Solution

The fourth proportional to 2,645.50, 3,968.96 and 1,328.90 is: 1,993.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,645.50 : 3,968.96 = 1,328.90 : x
  2. Step 2: Convert to fraction form
    2,645.50/3,968.96 = 1,328.90/x
  3. Step 3: Cross multiply
    2,645.50x = 3,968.96 × 1,328.90
  4. Step 4: Simplify right side
    2,645.50x = 5,274,324.45
  5. Step 5: Solve for x
    x = 5,274,324.45/2,645.50
  6. Step 6: Final answer
    x = 1,993.70

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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.