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Finding the Fourth Proportional to 1,914.18, 2,871.68 and 681.59

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Solution

The fourth proportional to 1,914.18, 2,871.68 and 681.59 is: 1,022.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.18 : 2,871.68 = 681.59 : x
  2. Step 2: Convert to fraction form
    1,914.18/2,871.68 = 681.59/x
  3. Step 3: Cross multiply
    1,914.18x = 2,871.68 × 681.59
  4. Step 4: Simplify right side
    1,914.18x = 1,957,308.37
  5. Step 5: Solve for x
    x = 1,957,308.37/1,914.18
  6. Step 6: Final answer
    x = 1,022.53

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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.