Home / 1,979.55-2,732.16-1,272.29

Finding the Fourth Proportional to 1,979.55, 2,732.16 and 1,272.29

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Solution

The fourth proportional to 1,979.55, 2,732.16 and 1,272.29 is: 1,756.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.55 : 2,732.16 = 1,272.29 : x
  2. Step 2: Convert to fraction form
    1,979.55/2,732.16 = 1,272.29/x
  3. Step 3: Cross multiply
    1,979.55x = 2,732.16 × 1,272.29
  4. Step 4: Simplify right side
    1,979.55x = 3,476,099.85
  5. Step 5: Solve for x
    x = 3,476,099.85/1,979.55
  6. Step 6: Final answer
    x = 1,756.01

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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.