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Finding the Fourth Proportional to 5,297.43, 7,311.03 and 2,939.79

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Solution

The fourth proportional to 5,297.43, 7,311.03 and 2,939.79 is: 4,057.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,297.43 : 7,311.03 = 2,939.79 : x
  2. Step 2: Convert to fraction form
    5,297.43/7,311.03 = 2,939.79/x
  3. Step 3: Cross multiply
    5,297.43x = 7,311.03 × 2,939.79
  4. Step 4: Simplify right side
    5,297.43x = 21,492,892.88
  5. Step 5: Solve for x
    x = 21,492,892.88/5,297.43
  6. Step 6: Final answer
    x = 4,057.23

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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.