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Finding the Fourth Proportional to 3,214.39, 4,821.69 and 993.28

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Solution

The fourth proportional to 3,214.39, 4,821.69 and 993.28 is: 1,489.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,214.39 : 4,821.69 = 993.28 : x
  2. Step 2: Convert to fraction form
    3,214.39/4,821.69 = 993.28/x
  3. Step 3: Cross multiply
    3,214.39x = 4,821.69 × 993.28
  4. Step 4: Simplify right side
    3,214.39x = 4,789,288.24
  5. Step 5: Solve for x
    x = 4,789,288.24/3,214.39
  6. Step 6: Final answer
    x = 1,489.95

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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.