Home / 1,725.76-2,381.61-979.75

Finding the Fourth Proportional to 1,725.76, 2,381.61 and 979.75

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Solution

The fourth proportional to 1,725.76, 2,381.61 and 979.75 is: 1,352.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.76 : 2,381.61 = 979.75 : x
  2. Step 2: Convert to fraction form
    1,725.76/2,381.61 = 979.75/x
  3. Step 3: Cross multiply
    1,725.76x = 2,381.61 × 979.75
  4. Step 4: Simplify right side
    1,725.76x = 2,333,382.40
  5. Step 5: Solve for x
    x = 2,333,382.40/1,725.76
  6. Step 6: Final answer
    x = 1,352.09

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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.