Home / 2,091.20-2,885.78-1,207.14

Finding the Fourth Proportional to 2,091.20, 2,885.78 and 1,207.14

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Solution

The fourth proportional to 2,091.20, 2,885.78 and 1,207.14 is: 1,665.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.20 : 2,885.78 = 1,207.14 : x
  2. Step 2: Convert to fraction form
    2,091.20/2,885.78 = 1,207.14/x
  3. Step 3: Cross multiply
    2,091.20x = 2,885.78 × 1,207.14
  4. Step 4: Simplify right side
    2,091.20x = 3,483,540.47
  5. Step 5: Solve for x
    x = 3,483,540.47/2,091.20
  6. Step 6: Final answer
    x = 1,665.81

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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.