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Finding the Fourth Proportional to 1,183.79, 1,633.15 and 717.23

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Solution

The fourth proportional to 1,183.79, 1,633.15 and 717.23 is: 989.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.79 : 1,633.15 = 717.23 : x
  2. Step 2: Convert to fraction form
    1,183.79/1,633.15 = 717.23/x
  3. Step 3: Cross multiply
    1,183.79x = 1,633.15 × 717.23
  4. Step 4: Simplify right side
    1,183.79x = 1,171,344.17
  5. Step 5: Solve for x
    x = 1,171,344.17/1,183.79
  6. Step 6: Final answer
    x = 989.49

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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.