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Finding the Fourth Proportional to 1,687.84, 2,330.68 and 1,059.44

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Solution

The fourth proportional to 1,687.84, 2,330.68 and 1,059.44 is: 1,462.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.84 : 2,330.68 = 1,059.44 : x
  2. Step 2: Convert to fraction form
    1,687.84/2,330.68 = 1,059.44/x
  3. Step 3: Cross multiply
    1,687.84x = 2,330.68 × 1,059.44
  4. Step 4: Simplify right side
    1,687.84x = 2,469,215.62
  5. Step 5: Solve for x
    x = 2,469,215.62/1,687.84
  6. Step 6: Final answer
    x = 1,462.94

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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.