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Finding the Fourth Proportional to 796.92, 1,100.40 and 677.72

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Solution

The fourth proportional to 796.92, 1,100.40 and 677.72 is: 935.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.92 : 1,100.40 = 677.72 : x
  2. Step 2: Convert to fraction form
    796.92/1,100.40 = 677.72/x
  3. Step 3: Cross multiply
    796.92x = 1,100.40 × 677.72
  4. Step 4: Simplify right side
    796.92x = 745,763.09
  5. Step 5: Solve for x
    x = 745,763.09/796.92
  6. Step 6: Final answer
    x = 935.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.