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Finding the Fourth Proportional to 796.13, 1,188.59 and 680.61

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Solution

The fourth proportional to 796.13, 1,188.59 and 680.61 is: 1,016.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.13 : 1,188.59 = 680.61 : x
  2. Step 2: Convert to fraction form
    796.13/1,188.59 = 680.61/x
  3. Step 3: Cross multiply
    796.13x = 1,188.59 × 680.61
  4. Step 4: Simplify right side
    796.13x = 808,965.39
  5. Step 5: Solve for x
    x = 808,965.39/796.13
  6. Step 6: Final answer
    x = 1,016.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.