Home / 1,725.68-2,381.55-979.48

Finding the Fourth Proportional to 1,725.68, 2,381.55 and 979.48

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Solution

The fourth proportional to 1,725.68, 2,381.55 and 979.48 is: 1,351.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.68 : 2,381.55 = 979.48 : x
  2. Step 2: Convert to fraction form
    1,725.68/2,381.55 = 979.48/x
  3. Step 3: Cross multiply
    1,725.68x = 2,381.55 × 979.48
  4. Step 4: Simplify right side
    1,725.68x = 2,332,682.06
  5. Step 5: Solve for x
    x = 2,332,682.06/1,725.68
  6. Step 6: Final answer
    x = 1,351.75

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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.