Home / 2,139.75-3,207.21-1,618.06

Finding the Fourth Proportional to 2,139.75, 3,207.21 and 1,618.06

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Solution

The fourth proportional to 2,139.75, 3,207.21 and 1,618.06 is: 2,425.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.75 : 3,207.21 = 1,618.06 : x
  2. Step 2: Convert to fraction form
    2,139.75/3,207.21 = 1,618.06/x
  3. Step 3: Cross multiply
    2,139.75x = 3,207.21 × 1,618.06
  4. Step 4: Simplify right side
    2,139.75x = 5,189,459.24
  5. Step 5: Solve for x
    x = 5,189,459.24/2,139.75
  6. Step 6: Final answer
    x = 2,425.26

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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.