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Finding the Fourth Proportional to 796.85, 1,195.61 and 431.89

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Solution

The fourth proportional to 796.85, 1,195.61 and 431.89 is: 648.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.85 : 1,195.61 = 431.89 : x
  2. Step 2: Convert to fraction form
    796.85/1,195.61 = 431.89/x
  3. Step 3: Cross multiply
    796.85x = 1,195.61 × 431.89
  4. Step 4: Simplify right side
    796.85x = 516,363.87
  5. Step 5: Solve for x
    x = 516,363.87/796.85
  6. Step 6: Final answer
    x = 648.01

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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.