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Finding the Fourth Proportional to 2,998.62, 4,129.45 and 2,989.51

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Solution

The fourth proportional to 2,998.62, 4,129.45 and 2,989.51 is: 4,116.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,998.62 : 4,129.45 = 2,989.51 : x
  2. Step 2: Convert to fraction form
    2,998.62/4,129.45 = 2,989.51/x
  3. Step 3: Cross multiply
    2,998.62x = 4,129.45 × 2,989.51
  4. Step 4: Simplify right side
    2,998.62x = 12,345,014.27
  5. Step 5: Solve for x
    x = 12,345,014.27/2,998.62
  6. Step 6: Final answer
    x = 4,116.90

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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.