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Finding the Fourth Proportional to 1,183.40, 1,633.06 and 686.03

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Solution

The fourth proportional to 1,183.40, 1,633.06 and 686.03 is: 946.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.40 : 1,633.06 = 686.03 : x
  2. Step 2: Convert to fraction form
    1,183.40/1,633.06 = 686.03/x
  3. Step 3: Cross multiply
    1,183.40x = 1,633.06 × 686.03
  4. Step 4: Simplify right side
    1,183.40x = 1,120,318.27
  5. Step 5: Solve for x
    x = 1,120,318.27/1,183.40
  6. Step 6: Final answer
    x = 946.70

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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.