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Finding the Fourth Proportional to 2,187.41, 3,281.45 and 800.43

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Solution

The fourth proportional to 2,187.41, 3,281.45 and 800.43 is: 1,200.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.41 : 3,281.45 = 800.43 : x
  2. Step 2: Convert to fraction form
    2,187.41/3,281.45 = 800.43/x
  3. Step 3: Cross multiply
    2,187.41x = 3,281.45 × 800.43
  4. Step 4: Simplify right side
    2,187.41x = 2,626,567.02
  5. Step 5: Solve for x
    x = 2,626,567.02/2,187.41
  6. Step 6: Final answer
    x = 1,200.76

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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.