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Finding the Fourth Proportional to 796.80, 1,195.95 and 407.09

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Solution

The fourth proportional to 796.80, 1,195.95 and 407.09 is: 611.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.80 : 1,195.95 = 407.09 : x
  2. Step 2: Convert to fraction form
    796.80/1,195.95 = 407.09/x
  3. Step 3: Cross multiply
    796.80x = 1,195.95 × 407.09
  4. Step 4: Simplify right side
    796.80x = 486,861.51
  5. Step 5: Solve for x
    x = 486,861.51/796.80
  6. Step 6: Final answer
    x = 611.02

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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.