Home / 2,131.40-3,197.10-1,670.60

Finding the Fourth Proportional to 2,131.40, 3,197.10 and 1,670.60

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Solution

The fourth proportional to 2,131.40, 3,197.10 and 1,670.60 is: 2,505.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.40 : 3,197.10 = 1,670.60 : x
  2. Step 2: Convert to fraction form
    2,131.40/3,197.10 = 1,670.60/x
  3. Step 3: Cross multiply
    2,131.40x = 3,197.10 × 1,670.60
  4. Step 4: Simplify right side
    2,131.40x = 5,341,075.26
  5. Step 5: Solve for x
    x = 5,341,075.26/2,131.40
  6. Step 6: Final answer
    x = 2,505.90

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Double scale
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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.