Home / 1,685.25-2,528.82-711.27

Finding the Fourth Proportional to 1,685.25, 2,528.82 and 711.27

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Solution

The fourth proportional to 1,685.25, 2,528.82 and 711.27 is: 1,067.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.25 : 2,528.82 = 711.27 : x
  2. Step 2: Convert to fraction form
    1,685.25/2,528.82 = 711.27/x
  3. Step 3: Cross multiply
    1,685.25x = 2,528.82 × 711.27
  4. Step 4: Simplify right side
    1,685.25x = 1,798,673.80
  5. Step 5: Solve for x
    x = 1,798,673.80/1,685.25
  6. Step 6: Final answer
    x = 1,067.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.