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Finding the Fourth Proportional to 2,069.96, 3,105.24 and 753.80

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Solution

The fourth proportional to 2,069.96, 3,105.24 and 753.80 is: 1,130.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,069.96 : 3,105.24 = 753.80 : x
  2. Step 2: Convert to fraction form
    2,069.96/3,105.24 = 753.80/x
  3. Step 3: Cross multiply
    2,069.96x = 3,105.24 × 753.80
  4. Step 4: Simplify right side
    2,069.96x = 2,340,729.91
  5. Step 5: Solve for x
    x = 2,340,729.91/2,069.96
  6. Step 6: Final answer
    x = 1,130.81

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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.