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Finding the Fourth Proportional to 836.97, 1,255.47 and 402.81

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Solution

The fourth proportional to 836.97, 1,255.47 and 402.81 is: 604.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.97 : 1,255.47 = 402.81 : x
  2. Step 2: Convert to fraction form
    836.97/1,255.47 = 402.81/x
  3. Step 3: Cross multiply
    836.97x = 1,255.47 × 402.81
  4. Step 4: Simplify right side
    836.97x = 505,715.87
  5. Step 5: Solve for x
    x = 505,715.87/836.97
  6. Step 6: Final answer
    x = 604.22

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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.