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Finding the Fourth Proportional to 2,309.80, 3,463.90 and 665.90

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Solution

The fourth proportional to 2,309.80, 3,463.90 and 665.90 is: 998.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.80 : 3,463.90 = 665.90 : x
  2. Step 2: Convert to fraction form
    2,309.80/3,463.90 = 665.90/x
  3. Step 3: Cross multiply
    2,309.80x = 3,463.90 × 665.90
  4. Step 4: Simplify right side
    2,309.80x = 2,306,611.01
  5. Step 5: Solve for x
    x = 2,306,611.01/2,309.80
  6. Step 6: Final answer
    x = 998.62

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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.