Home / 1,972.42-2,720.79-1,273.80

Finding the Fourth Proportional to 1,972.42, 2,720.79 and 1,273.80

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Solution

The fourth proportional to 1,972.42, 2,720.79 and 1,273.80 is: 1,757.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.42 : 2,720.79 = 1,273.80 : x
  2. Step 2: Convert to fraction form
    1,972.42/2,720.79 = 1,273.80/x
  3. Step 3: Cross multiply
    1,972.42x = 2,720.79 × 1,273.80
  4. Step 4: Simplify right side
    1,972.42x = 3,465,742.30
  5. Step 5: Solve for x
    x = 3,465,742.30/1,972.42
  6. Step 6: Final answer
    x = 1,757.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.