Home / 1,687.32-2,326.97-1,328.57

Finding the Fourth Proportional to 1,687.32, 2,326.97 and 1,328.57

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Solution

The fourth proportional to 1,687.32, 2,326.97 and 1,328.57 is: 1,832.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.32 : 2,326.97 = 1,328.57 : x
  2. Step 2: Convert to fraction form
    1,687.32/2,326.97 = 1,328.57/x
  3. Step 3: Cross multiply
    1,687.32x = 2,326.97 × 1,328.57
  4. Step 4: Simplify right side
    1,687.32x = 3,091,524.26
  5. Step 5: Solve for x
    x = 3,091,524.26/1,687.32
  6. Step 6: Final answer
    x = 1,832.21

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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.