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Finding the Fourth Proportional to 2,732.80, 4,099.92 and 785.16

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Solution

The fourth proportional to 2,732.80, 4,099.92 and 785.16 is: 1,177.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,732.80 : 4,099.92 = 785.16 : x
  2. Step 2: Convert to fraction form
    2,732.80/4,099.92 = 785.16/x
  3. Step 3: Cross multiply
    2,732.80x = 4,099.92 × 785.16
  4. Step 4: Simplify right side
    2,732.80x = 3,219,093.19
  5. Step 5: Solve for x
    x = 3,219,093.19/2,732.80
  6. Step 6: Final answer
    x = 1,177.95

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1.5x scale

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.