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Finding the Fourth Proportional to 1,680.26, 2,520.70 and 755.84

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Solution

The fourth proportional to 1,680.26, 2,520.70 and 755.84 is: 1,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.26 : 2,520.70 = 755.84 : x
  2. Step 2: Convert to fraction form
    1,680.26/2,520.70 = 755.84/x
  3. Step 3: Cross multiply
    1,680.26x = 2,520.70 × 755.84
  4. Step 4: Simplify right side
    1,680.26x = 1,905,245.89
  5. Step 5: Solve for x
    x = 1,905,245.89/1,680.26
  6. Step 6: Final answer
    x = 1,133.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.