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Finding the Fourth Proportional to 836.96, 1,255.59 and 317.12

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Solution

The fourth proportional to 836.96, 1,255.59 and 317.12 is: 475.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.96 : 1,255.59 = 317.12 : x
  2. Step 2: Convert to fraction form
    836.96/1,255.59 = 317.12/x
  3. Step 3: Cross multiply
    836.96x = 1,255.59 × 317.12
  4. Step 4: Simplify right side
    836.96x = 398,166.42
  5. Step 5: Solve for x
    x = 398,166.42/836.96
  6. Step 6: Final answer
    x = 475.73

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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.