Home / 1,687.25-2,328.68-1,246.43

Finding the Fourth Proportional to 1,687.25, 2,328.68 and 1,246.43

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Solution

The fourth proportional to 1,687.25, 2,328.68 and 1,246.43 is: 1,720.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.25 : 2,328.68 = 1,246.43 : x
  2. Step 2: Convert to fraction form
    1,687.25/2,328.68 = 1,246.43/x
  3. Step 3: Cross multiply
    1,687.25x = 2,328.68 × 1,246.43
  4. Step 4: Simplify right side
    1,687.25x = 2,902,518.74
  5. Step 5: Solve for x
    x = 2,902,518.74/1,687.25
  6. Step 6: Final answer
    x = 1,720.27

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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.