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Finding the Fourth Proportional to 5,318.55, 7,975.80 and 1,759.86

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Solution

The fourth proportional to 5,318.55, 7,975.80 and 1,759.86 is: 2,639.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.55 : 7,975.80 = 1,759.86 : x
  2. Step 2: Convert to fraction form
    5,318.55/7,975.80 = 1,759.86/x
  3. Step 3: Cross multiply
    5,318.55x = 7,975.80 × 1,759.86
  4. Step 4: Simplify right side
    5,318.55x = 14,036,291.39
  5. Step 5: Solve for x
    x = 14,036,291.39/5,318.55
  6. Step 6: Final answer
    x = 2,639.12

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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.