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Finding the Fourth Proportional to 2,016, 2,781.12 and 1,426.86

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Solution

The fourth proportional to 2,016, 2,781.12 and 1,426.86 is: 1,968.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,016 : 2,781.12 = 1,426.86 : x
  2. Step 2: Convert to fraction form
    2,016/2,781.12 = 1,426.86/x
  3. Step 3: Cross multiply
    2,016x = 2,781.12 × 1,426.86
  4. Step 4: Simplify right side
    2,016x = 3,968,268.88
  5. Step 5: Solve for x
    x = 3,968,268.88/2,016
  6. Step 6: Final answer
    x = 1,968.39

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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.