Home / 1,725.02-2,380.66-979.12

Finding the Fourth Proportional to 1,725.02, 2,380.66 and 979.12

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Solution

The fourth proportional to 1,725.02, 2,380.66 and 979.12 is: 1,351.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.02 : 2,380.66 = 979.12 : x
  2. Step 2: Convert to fraction form
    1,725.02/2,380.66 = 979.12/x
  3. Step 3: Cross multiply
    1,725.02x = 2,380.66 × 979.12
  4. Step 4: Simplify right side
    1,725.02x = 2,330,951.82
  5. Step 5: Solve for x
    x = 2,330,951.82/1,725.02
  6. Step 6: Final answer
    x = 1,351.26

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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.