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Finding the Fourth Proportional to 949.94, 1,311.01 and 684.59

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Solution

The fourth proportional to 949.94, 1,311.01 and 684.59 is: 944.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.94 : 1,311.01 = 684.59 : x
  2. Step 2: Convert to fraction form
    949.94/1,311.01 = 684.59/x
  3. Step 3: Cross multiply
    949.94x = 1,311.01 × 684.59
  4. Step 4: Simplify right side
    949.94x = 897,505.90
  5. Step 5: Solve for x
    x = 897,505.90/949.94
  6. Step 6: Final answer
    x = 944.81

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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.