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Finding the Fourth Proportional to 2,389.50, 3,584.22 and 928.65

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Solution

The fourth proportional to 2,389.50, 3,584.22 and 928.65 is: 1,392.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.50 : 3,584.22 = 928.65 : x
  2. Step 2: Convert to fraction form
    2,389.50/3,584.22 = 928.65/x
  3. Step 3: Cross multiply
    2,389.50x = 3,584.22 × 928.65
  4. Step 4: Simplify right side
    2,389.50x = 3,328,485.90
  5. Step 5: Solve for x
    x = 3,328,485.90/2,389.50
  6. Step 6: Final answer
    x = 1,392.96

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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.