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Finding the Fourth Proportional to 2,734.68, 4,101.88 and 786.64

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Solution

The fourth proportional to 2,734.68, 4,101.88 and 786.64 is: 1,179.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,734.68 : 4,101.88 = 786.64 : x
  2. Step 2: Convert to fraction form
    2,734.68/4,101.88 = 786.64/x
  3. Step 3: Cross multiply
    2,734.68x = 4,101.88 × 786.64
  4. Step 4: Simplify right side
    2,734.68x = 3,226,702.88
  5. Step 5: Solve for x
    x = 3,226,702.88/2,734.68
  6. Step 6: Final answer
    x = 1,179.92

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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.