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Finding the Fourth Proportional to 5,318.94, 7,976.78 and 1,855.38

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Solution

The fourth proportional to 5,318.94, 7,976.78 and 1,855.38 is: 2,782.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.94 : 7,976.78 = 1,855.38 : x
  2. Step 2: Convert to fraction form
    5,318.94/7,976.78 = 1,855.38/x
  3. Step 3: Cross multiply
    5,318.94x = 7,976.78 × 1,855.38
  4. Step 4: Simplify right side
    5,318.94x = 14,799,958.08
  5. Step 5: Solve for x
    x = 14,799,958.08/5,318.94
  6. Step 6: Final answer
    x = 2,782.50

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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.