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Finding the Fourth Proportional to 3,998.39, 5,518.31 and 2,426.51

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Solution

The fourth proportional to 3,998.39, 5,518.31 and 2,426.51 is: 3,348.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.39 : 5,518.31 = 2,426.51 : x
  2. Step 2: Convert to fraction form
    3,998.39/5,518.31 = 2,426.51/x
  3. Step 3: Cross multiply
    3,998.39x = 5,518.31 × 2,426.51
  4. Step 4: Simplify right side
    3,998.39x = 13,390,194.67
  5. Step 5: Solve for x
    x = 13,390,194.67/3,998.39
  6. Step 6: Final answer
    x = 3,348.90

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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.