Home / 1,971.20-2,720.25-1,086.99

Finding the Fourth Proportional to 1,971.20, 2,720.25 and 1,086.99

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Solution

The fourth proportional to 1,971.20, 2,720.25 and 1,086.99 is: 1,500.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.20 : 2,720.25 = 1,086.99 : x
  2. Step 2: Convert to fraction form
    1,971.20/2,720.25 = 1,086.99/x
  3. Step 3: Cross multiply
    1,971.20x = 2,720.25 × 1,086.99
  4. Step 4: Simplify right side
    1,971.20x = 2,956,884.55
  5. Step 5: Solve for x
    x = 2,956,884.55/1,971.20
  6. Step 6: Final answer
    x = 1,500.05

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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.