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Finding the Fourth Proportional to 3,998.91, 5,520 and 3,007.08

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Solution

The fourth proportional to 3,998.91, 5,520 and 3,007.08 is: 4,150.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.91 : 5,520 = 3,007.08 : x
  2. Step 2: Convert to fraction form
    3,998.91/5,520 = 3,007.08/x
  3. Step 3: Cross multiply
    3,998.91x = 5,520 × 3,007.08
  4. Step 4: Simplify right side
    3,998.91x = 16,599,081.60
  5. Step 5: Solve for x
    x = 16,599,081.60/3,998.91
  6. Step 6: Final answer
    x = 4,150.90

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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.