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Finding the Fourth Proportional to 5,318.92, 7,978.38 and 2,544.40

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Solution

The fourth proportional to 5,318.92, 7,978.38 and 2,544.40 is: 3,816.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.92 : 7,978.38 = 2,544.40 : x
  2. Step 2: Convert to fraction form
    5,318.92/7,978.38 = 2,544.40/x
  3. Step 3: Cross multiply
    5,318.92x = 7,978.38 × 2,544.40
  4. Step 4: Simplify right side
    5,318.92x = 20,300,190.07
  5. Step 5: Solve for x
    x = 20,300,190.07/5,318.92
  6. Step 6: Final answer
    x = 3,816.60

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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.