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Finding the Fourth Proportional to 1,183.50, 1,633.38 and 717.75

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Solution

The fourth proportional to 1,183.50, 1,633.38 and 717.75 is: 990.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.50 : 1,633.38 = 717.75 : x
  2. Step 2: Convert to fraction form
    1,183.50/1,633.38 = 717.75/x
  3. Step 3: Cross multiply
    1,183.50x = 1,633.38 × 717.75
  4. Step 4: Simplify right side
    1,183.50x = 1,172,358.50
  5. Step 5: Solve for x
    x = 1,172,358.50/1,183.50
  6. Step 6: Final answer
    x = 990.59

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Half scale
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Double scale
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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.