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Finding the Fourth Proportional to 2,928.52, 4,391.77 and 847.96

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Solution

The fourth proportional to 2,928.52, 4,391.77 and 847.96 is: 1,271.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.52 : 4,391.77 = 847.96 : x
  2. Step 2: Convert to fraction form
    2,928.52/4,391.77 = 847.96/x
  3. Step 3: Cross multiply
    2,928.52x = 4,391.77 × 847.96
  4. Step 4: Simplify right side
    2,928.52x = 3,724,064.08
  5. Step 5: Solve for x
    x = 3,724,064.08/2,928.52
  6. Step 6: Final answer
    x = 1,271.65

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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.