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Finding the Fourth Proportional to 5,679.94, 8,520.21 and 1,784.65

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Solution

The fourth proportional to 5,679.94, 8,520.21 and 1,784.65 is: 2,677.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.94 : 8,520.21 = 1,784.65 : x
  2. Step 2: Convert to fraction form
    5,679.94/8,520.21 = 1,784.65/x
  3. Step 3: Cross multiply
    5,679.94x = 8,520.21 × 1,784.65
  4. Step 4: Simplify right side
    5,679.94x = 15,205,571.48
  5. Step 5: Solve for x
    x = 15,205,571.48/5,679.94
  6. Step 6: Final answer
    x = 2,677.07

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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.