Home / 1,725.85-2,381.68-939.90

Finding the Fourth Proportional to 1,725.85, 2,381.68 and 939.90

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Solution

The fourth proportional to 1,725.85, 2,381.68 and 939.90 is: 1,297.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.85 : 2,381.68 = 939.90 : x
  2. Step 2: Convert to fraction form
    1,725.85/2,381.68 = 939.90/x
  3. Step 3: Cross multiply
    1,725.85x = 2,381.68 × 939.90
  4. Step 4: Simplify right side
    1,725.85x = 2,238,541.03
  5. Step 5: Solve for x
    x = 2,238,541.03/1,725.85
  6. Step 6: Final answer
    x = 1,297.07

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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.