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Finding the Fourth Proportional to 2,204.60, 3,305.78 and 665.40

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Solution

The fourth proportional to 2,204.60, 3,305.78 and 665.40 is: 997.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,204.60 : 3,305.78 = 665.40 : x
  2. Step 2: Convert to fraction form
    2,204.60/3,305.78 = 665.40/x
  3. Step 3: Cross multiply
    2,204.60x = 3,305.78 × 665.40
  4. Step 4: Simplify right side
    2,204.60x = 2,199,666.01
  5. Step 5: Solve for x
    x = 2,199,666.01/2,204.60
  6. Step 6: Final answer
    x = 997.76

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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.