Home / 1,971.72-2,720.50-1,272.96

Finding the Fourth Proportional to 1,971.72, 2,720.50 and 1,272.96

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Solution

The fourth proportional to 1,971.72, 2,720.50 and 1,272.96 is: 1,756.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.72 : 2,720.50 = 1,272.96 : x
  2. Step 2: Convert to fraction form
    1,971.72/2,720.50 = 1,272.96/x
  3. Step 3: Cross multiply
    1,971.72x = 2,720.50 × 1,272.96
  4. Step 4: Simplify right side
    1,971.72x = 3,463,087.68
  5. Step 5: Solve for x
    x = 3,463,087.68/1,971.72
  6. Step 6: Final answer
    x = 1,756.38

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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.