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Finding the Fourth Proportional to 2,076.15, 3,114.16 and 843.20

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Solution

The fourth proportional to 2,076.15, 3,114.16 and 843.20 is: 1,264.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,076.15 : 3,114.16 = 843.20 : x
  2. Step 2: Convert to fraction form
    2,076.15/3,114.16 = 843.20/x
  3. Step 3: Cross multiply
    2,076.15x = 3,114.16 × 843.20
  4. Step 4: Simplify right side
    2,076.15x = 2,625,842.03
  5. Step 5: Solve for x
    x = 2,625,842.03/2,076.15
  6. Step 6: Final answer
    x = 1,264.77

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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.