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Finding the Fourth Proportional to 1,975.45, 2,725.14 and 1,311.45

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Solution

The fourth proportional to 1,975.45, 2,725.14 and 1,311.45 is: 1,809.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,975.45 : 2,725.14 = 1,311.45 : x
  2. Step 2: Convert to fraction form
    1,975.45/2,725.14 = 1,311.45/x
  3. Step 3: Cross multiply
    1,975.45x = 2,725.14 × 1,311.45
  4. Step 4: Simplify right side
    1,975.45x = 3,573,884.85
  5. Step 5: Solve for x
    x = 3,573,884.85/1,975.45
  6. Step 6: Final answer
    x = 1,809.15

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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.