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Finding the Fourth Proportional to 1,687.31, 2,329.12 and 1,450.31

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Solution

The fourth proportional to 1,687.31, 2,329.12 and 1,450.31 is: 2,001.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.31 : 2,329.12 = 1,450.31 : x
  2. Step 2: Convert to fraction form
    1,687.31/2,329.12 = 1,450.31/x
  3. Step 3: Cross multiply
    1,687.31x = 2,329.12 × 1,450.31
  4. Step 4: Simplify right side
    1,687.31x = 3,377,946.03
  5. Step 5: Solve for x
    x = 3,377,946.03/1,687.31
  6. Step 6: Final answer
    x = 2,001.97

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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.