Home / 2,126.80-3,190.20-972.55

Finding the Fourth Proportional to 2,126.80, 3,190.20 and 972.55

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Solution

The fourth proportional to 2,126.80, 3,190.20 and 972.55 is: 1,458.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.80 : 3,190.20 = 972.55 : x
  2. Step 2: Convert to fraction form
    2,126.80/3,190.20 = 972.55/x
  3. Step 3: Cross multiply
    2,126.80x = 3,190.20 × 972.55
  4. Step 4: Simplify right side
    2,126.80x = 3,102,629.01
  5. Step 5: Solve for x
    x = 3,102,629.01/2,126.80
  6. Step 6: Final answer
    x = 1,458.83

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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.