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Finding the Fourth Proportional to 1,863.25, 2,790.61 and 890.03

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Solution

The fourth proportional to 1,863.25, 2,790.61 and 890.03 is: 1,333.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.25 : 2,790.61 = 890.03 : x
  2. Step 2: Convert to fraction form
    1,863.25/2,790.61 = 890.03/x
  3. Step 3: Cross multiply
    1,863.25x = 2,790.61 × 890.03
  4. Step 4: Simplify right side
    1,863.25x = 2,483,726.62
  5. Step 5: Solve for x
    x = 2,483,726.62/1,863.25
  6. Step 6: Final answer
    x = 1,333.01

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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.