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Finding the Fourth Proportional to 950.96, 1,311.72 and 838.64

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Solution

The fourth proportional to 950.96, 1,311.72 and 838.64 is: 1,156.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.96 : 1,311.72 = 838.64 : x
  2. Step 2: Convert to fraction form
    950.96/1,311.72 = 838.64/x
  3. Step 3: Cross multiply
    950.96x = 1,311.72 × 838.64
  4. Step 4: Simplify right side
    950.96x = 1,100,060.86
  5. Step 5: Solve for x
    x = 1,100,060.86/950.96
  6. Step 6: Final answer
    x = 1,156.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.