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Finding the Fourth Proportional to 2,768.56, 4,152.88 and 688.56

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Solution

The fourth proportional to 2,768.56, 4,152.88 and 688.56 is: 1,032.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.56 : 4,152.88 = 688.56 : x
  2. Step 2: Convert to fraction form
    2,768.56/4,152.88 = 688.56/x
  3. Step 3: Cross multiply
    2,768.56x = 4,152.88 × 688.56
  4. Step 4: Simplify right side
    2,768.56x = 2,859,507.05
  5. Step 5: Solve for x
    x = 2,859,507.05/2,768.56
  6. Step 6: Final answer
    x = 1,032.85

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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.