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Finding the Fourth Proportional to 5,179.80, 7,765.04 and 1,890.59

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Solution

The fourth proportional to 5,179.80, 7,765.04 and 1,890.59 is: 2,834.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.80 : 7,765.04 = 1,890.59 : x
  2. Step 2: Convert to fraction form
    5,179.80/7,765.04 = 1,890.59/x
  3. Step 3: Cross multiply
    5,179.80x = 7,765.04 × 1,890.59
  4. Step 4: Simplify right side
    5,179.80x = 14,680,458.70
  5. Step 5: Solve for x
    x = 14,680,458.70/5,179.80
  6. Step 6: Final answer
    x = 2,834.17

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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.