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Finding the Fourth Proportional to 1,183.46, 1,633.02 and 686.12

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Solution

The fourth proportional to 1,183.46, 1,633.02 and 686.12 is: 946.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.46 : 1,633.02 = 686.12 : x
  2. Step 2: Convert to fraction form
    1,183.46/1,633.02 = 686.12/x
  3. Step 3: Cross multiply
    1,183.46x = 1,633.02 × 686.12
  4. Step 4: Simplify right side
    1,183.46x = 1,120,447.68
  5. Step 5: Solve for x
    x = 1,120,447.68/1,183.46
  6. Step 6: Final answer
    x = 946.76

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1.5x scale

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.