Home / 1,725.69-2,381.39-939.75

Finding the Fourth Proportional to 1,725.69, 2,381.39 and 939.75

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Solution

The fourth proportional to 1,725.69, 2,381.39 and 939.75 is: 1,296.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.69 : 2,381.39 = 939.75 : x
  2. Step 2: Convert to fraction form
    1,725.69/2,381.39 = 939.75/x
  3. Step 3: Cross multiply
    1,725.69x = 2,381.39 × 939.75
  4. Step 4: Simplify right side
    1,725.69x = 2,237,901.15
  5. Step 5: Solve for x
    x = 2,237,901.15/1,725.69
  6. Step 6: Final answer
    x = 1,296.81

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1.5x scale

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.