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Finding the Fourth Proportional to 2,489.81, 3,735.05 and 845.91

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Solution

The fourth proportional to 2,489.81, 3,735.05 and 845.91 is: 1,268.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.81 : 3,735.05 = 845.91 : x
  2. Step 2: Convert to fraction form
    2,489.81/3,735.05 = 845.91/x
  3. Step 3: Cross multiply
    2,489.81x = 3,735.05 × 845.91
  4. Step 4: Simplify right side
    2,489.81x = 3,159,511.92
  5. Step 5: Solve for x
    x = 3,159,511.92/2,489.81
  6. Step 6: Final answer
    x = 1,268.98

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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.