Home / 2,126.27-3,189.02-720.76

Finding the Fourth Proportional to 2,126.27, 3,189.02 and 720.76

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Solution

The fourth proportional to 2,126.27, 3,189.02 and 720.76 is: 1,081.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.27 : 3,189.02 = 720.76 : x
  2. Step 2: Convert to fraction form
    2,126.27/3,189.02 = 720.76/x
  3. Step 3: Cross multiply
    2,126.27x = 3,189.02 × 720.76
  4. Step 4: Simplify right side
    2,126.27x = 2,298,518.44
  5. Step 5: Solve for x
    x = 2,298,518.44/2,126.27
  6. Step 6: Final answer
    x = 1,081.01

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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.