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Finding the Fourth Proportional to 843.75, 1,165.05 and 623.03

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Solution

The fourth proportional to 843.75, 1,165.05 and 623.03 is: 860.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.75 : 1,165.05 = 623.03 : x
  2. Step 2: Convert to fraction form
    843.75/1,165.05 = 623.03/x
  3. Step 3: Cross multiply
    843.75x = 1,165.05 × 623.03
  4. Step 4: Simplify right side
    843.75x = 725,855.28
  5. Step 5: Solve for x
    x = 725,855.28/843.75
  6. Step 6: Final answer
    x = 860.27

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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.