Home / 1,720.14-2,383.80-1,687.32

Finding the Fourth Proportional to 1,720.14, 2,383.80 and 1,687.32

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Solution

The fourth proportional to 1,720.14, 2,383.80 and 1,687.32 is: 2,338.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.14 : 2,383.80 = 1,687.32 : x
  2. Step 2: Convert to fraction form
    1,720.14/2,383.80 = 1,687.32/x
  3. Step 3: Cross multiply
    1,720.14x = 2,383.80 × 1,687.32
  4. Step 4: Simplify right side
    1,720.14x = 4,022,233.42
  5. Step 5: Solve for x
    x = 4,022,233.42/1,720.14
  6. Step 6: Final answer
    x = 2,338.32

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.