Home / 1,725.23-2,380.96-979.32

Finding the Fourth Proportional to 1,725.23, 2,380.96 and 979.32

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Solution

The fourth proportional to 1,725.23, 2,380.96 and 979.32 is: 1,351.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.23 : 2,380.96 = 979.32 : x
  2. Step 2: Convert to fraction form
    1,725.23/2,380.96 = 979.32/x
  3. Step 3: Cross multiply
    1,725.23x = 2,380.96 × 979.32
  4. Step 4: Simplify right side
    1,725.23x = 2,331,731.90
  5. Step 5: Solve for x
    x = 2,331,731.90/1,725.23
  6. Step 6: Final answer
    x = 1,351.55

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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.