Home / 2,131.70-3,201.02-1,315.16

Finding the Fourth Proportional to 2,131.70, 3,201.02 and 1,315.16

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Solution

The fourth proportional to 2,131.70, 3,201.02 and 1,315.16 is: 1,974.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.70 : 3,201.02 = 1,315.16 : x
  2. Step 2: Convert to fraction form
    2,131.70/3,201.02 = 1,315.16/x
  3. Step 3: Cross multiply
    2,131.70x = 3,201.02 × 1,315.16
  4. Step 4: Simplify right side
    2,131.70x = 4,209,860.98
  5. Step 5: Solve for x
    x = 4,209,860.98/2,131.70
  6. Step 6: Final answer
    x = 1,974.89

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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.