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Finding the Fourth Proportional to 1,803.63, 2,488.20 and 1,581.90

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Solution

The fourth proportional to 1,803.63, 2,488.20 and 1,581.90 is: 2,182.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.63 : 2,488.20 = 1,581.90 : x
  2. Step 2: Convert to fraction form
    1,803.63/2,488.20 = 1,581.90/x
  3. Step 3: Cross multiply
    1,803.63x = 2,488.20 × 1,581.90
  4. Step 4: Simplify right side
    1,803.63x = 3,936,083.58
  5. Step 5: Solve for x
    x = 3,936,083.58/1,803.63
  6. Step 6: Final answer
    x = 2,182.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.