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Finding the Fourth Proportional to 1,725.07, 2,380.62 and 979

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Solution

The fourth proportional to 1,725.07, 2,380.62 and 979 is: 1,351.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.07 : 2,380.62 = 979 : x
  2. Step 2: Convert to fraction form
    1,725.07/2,380.62 = 979/x
  3. Step 3: Cross multiply
    1,725.07x = 2,380.62 × 979
  4. Step 4: Simplify right side
    1,725.07x = 2,330,626.98
  5. Step 5: Solve for x
    x = 2,330,626.98/1,725.07
  6. Step 6: Final answer
    x = 1,351.03

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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.