Home / 2,131.10-3,196.65-1,256.30

Finding the Fourth Proportional to 2,131.10, 3,196.65 and 1,256.30

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Solution

The fourth proportional to 2,131.10, 3,196.65 and 1,256.30 is: 1,884.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.10 : 3,196.65 = 1,256.30 : x
  2. Step 2: Convert to fraction form
    2,131.10/3,196.65 = 1,256.30/x
  3. Step 3: Cross multiply
    2,131.10x = 3,196.65 × 1,256.30
  4. Step 4: Simplify right side
    2,131.10x = 4,015,951.40
  5. Step 5: Solve for x
    x = 4,015,951.40/2,131.10
  6. Step 6: Final answer
    x = 1,884.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.