Home / 2,131.20-2,944.80-1,742.40

Finding the Fourth Proportional to 2,131.20, 2,944.80 and 1,742.40

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Solution

The fourth proportional to 2,131.20, 2,944.80 and 1,742.40 is: 2,407.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.20 : 2,944.80 = 1,742.40 : x
  2. Step 2: Convert to fraction form
    2,131.20/2,944.80 = 1,742.40/x
  3. Step 3: Cross multiply
    2,131.20x = 2,944.80 × 1,742.40
  4. Step 4: Simplify right side
    2,131.20x = 5,131,019.52
  5. Step 5: Solve for x
    x = 5,131,019.52/2,131.20
  6. Step 6: Final answer
    x = 2,407.57

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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.