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Finding the Fourth Proportional to 1,815.09, 2,723.72 and 660.93

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Solution

The fourth proportional to 1,815.09, 2,723.72 and 660.93 is: 991.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.09 : 2,723.72 = 660.93 : x
  2. Step 2: Convert to fraction form
    1,815.09/2,723.72 = 660.93/x
  3. Step 3: Cross multiply
    1,815.09x = 2,723.72 × 660.93
  4. Step 4: Simplify right side
    1,815.09x = 1,800,188.26
  5. Step 5: Solve for x
    x = 1,800,188.26/1,815.09
  6. Step 6: Final answer
    x = 991.79

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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.