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Finding the Fourth Proportional to 3,661.70, 5,491.86 and 993.26

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Solution

The fourth proportional to 3,661.70, 5,491.86 and 993.26 is: 1,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,661.70 : 5,491.86 = 993.26 : x
  2. Step 2: Convert to fraction form
    3,661.70/5,491.86 = 993.26/x
  3. Step 3: Cross multiply
    3,661.70x = 5,491.86 × 993.26
  4. Step 4: Simplify right side
    3,661.70x = 5,454,844.86
  5. Step 5: Solve for x
    x = 5,454,844.86/3,661.70
  6. Step 6: Final answer
    x = 1,489.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.