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Finding the Fourth Proportional to 1,843.61, 2,765.86 and 545.09

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Solution

The fourth proportional to 1,843.61, 2,765.86 and 545.09 is: 817.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,843.61 : 2,765.86 = 545.09 : x
  2. Step 2: Convert to fraction form
    1,843.61/2,765.86 = 545.09/x
  3. Step 3: Cross multiply
    1,843.61x = 2,765.86 × 545.09
  4. Step 4: Simplify right side
    1,843.61x = 1,507,627.44
  5. Step 5: Solve for x
    x = 1,507,627.44/1,843.61
  6. Step 6: Final answer
    x = 817.76

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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.