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Finding the Fourth Proportional to 2,114.55, 3,171.86 and 881.66

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Solution

The fourth proportional to 2,114.55, 3,171.86 and 881.66 is: 1,322.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.55 : 3,171.86 = 881.66 : x
  2. Step 2: Convert to fraction form
    2,114.55/3,171.86 = 881.66/x
  3. Step 3: Cross multiply
    2,114.55x = 3,171.86 × 881.66
  4. Step 4: Simplify right side
    2,114.55x = 2,796,502.09
  5. Step 5: Solve for x
    x = 2,796,502.09/2,114.55
  6. Step 6: Final answer
    x = 1,322.50

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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.