Home / 1,725.25-2,380.84-979.35

Finding the Fourth Proportional to 1,725.25, 2,380.84 and 979.35

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Solution

The fourth proportional to 1,725.25, 2,380.84 and 979.35 is: 1,351.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.25 : 2,380.84 = 979.35 : x
  2. Step 2: Convert to fraction form
    1,725.25/2,380.84 = 979.35/x
  3. Step 3: Cross multiply
    1,725.25x = 2,380.84 × 979.35
  4. Step 4: Simplify right side
    1,725.25x = 2,331,670.76
  5. Step 5: Solve for x
    x = 2,331,670.76/1,725.25
  6. Step 6: Final answer
    x = 1,351.50

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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.