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Finding the Fourth Proportional to 4,990.68, 7,481.13 and 4,251.96

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Solution

The fourth proportional to 4,990.68, 7,481.13 and 4,251.96 is: 6,373.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.68 : 7,481.13 = 4,251.96 : x
  2. Step 2: Convert to fraction form
    4,990.68/7,481.13 = 4,251.96/x
  3. Step 3: Cross multiply
    4,990.68x = 7,481.13 × 4,251.96
  4. Step 4: Simplify right side
    4,990.68x = 31,809,465.51
  5. Step 5: Solve for x
    x = 31,809,465.51/4,990.68
  6. Step 6: Final answer
    x = 6,373.77

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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.