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Finding the Fourth Proportional to 796.28, 1,194.80 and 425.86

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Solution

The fourth proportional to 796.28, 1,194.80 and 425.86 is: 638.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.28 : 1,194.80 = 425.86 : x
  2. Step 2: Convert to fraction form
    796.28/1,194.80 = 425.86/x
  3. Step 3: Cross multiply
    796.28x = 1,194.80 × 425.86
  4. Step 4: Simplify right side
    796.28x = 508,814.81
  5. Step 5: Solve for x
    x = 508,814.81/796.28
  6. Step 6: Final answer
    x = 638.99

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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.