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Finding the Fourth Proportional to 5,318.94, 7,986.54 and 2,858.55

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Solution

The fourth proportional to 5,318.94, 7,986.54 and 2,858.55 is: 4,292.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.94 : 7,986.54 = 2,858.55 : x
  2. Step 2: Convert to fraction form
    5,318.94/7,986.54 = 2,858.55/x
  3. Step 3: Cross multiply
    5,318.94x = 7,986.54 × 2,858.55
  4. Step 4: Simplify right side
    5,318.94x = 22,829,923.92
  5. Step 5: Solve for x
    x = 22,829,923.92/5,318.94
  6. Step 6: Final answer
    x = 4,292.19

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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.