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Finding the Fourth Proportional to 5,326.43, 7,984.79 and 1,861.79

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Solution

The fourth proportional to 5,326.43, 7,984.79 and 1,861.79 is: 2,790.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,326.43 : 7,984.79 = 1,861.79 : x
  2. Step 2: Convert to fraction form
    5,326.43/7,984.79 = 1,861.79/x
  3. Step 3: Cross multiply
    5,326.43x = 7,984.79 × 1,861.79
  4. Step 4: Simplify right side
    5,326.43x = 14,865,992.87
  5. Step 5: Solve for x
    x = 14,865,992.87/5,326.43
  6. Step 6: Final answer
    x = 2,790.99

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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.