Home / 1,725.21-2,380.38-979.01

Finding the Fourth Proportional to 1,725.21, 2,380.38 and 979.01

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Solution

The fourth proportional to 1,725.21, 2,380.38 and 979.01 is: 1,350.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.21 : 2,380.38 = 979.01 : x
  2. Step 2: Convert to fraction form
    1,725.21/2,380.38 = 979.01/x
  3. Step 3: Cross multiply
    1,725.21x = 2,380.38 × 979.01
  4. Step 4: Simplify right side
    1,725.21x = 2,330,403.92
  5. Step 5: Solve for x
    x = 2,330,403.92/1,725.21
  6. Step 6: Final answer
    x = 1,350.79

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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.