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Finding the Fourth Proportional to 2,765.35, 4,148.03 and 817.53

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Solution

The fourth proportional to 2,765.35, 4,148.03 and 817.53 is: 1,226.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.35 : 4,148.03 = 817.53 : x
  2. Step 2: Convert to fraction form
    2,765.35/4,148.03 = 817.53/x
  3. Step 3: Cross multiply
    2,765.35x = 4,148.03 × 817.53
  4. Step 4: Simplify right side
    2,765.35x = 3,391,138.97
  5. Step 5: Solve for x
    x = 3,391,138.97/2,765.35
  6. Step 6: Final answer
    x = 1,226.30

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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.