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Finding the Fourth Proportional to 2,739.59, 4,108.93 and 765.35

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Solution

The fourth proportional to 2,739.59, 4,108.93 and 765.35 is: 1,147.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.59 : 4,108.93 = 765.35 : x
  2. Step 2: Convert to fraction form
    2,739.59/4,108.93 = 765.35/x
  3. Step 3: Cross multiply
    2,739.59x = 4,108.93 × 765.35
  4. Step 4: Simplify right side
    2,739.59x = 3,144,769.58
  5. Step 5: Solve for x
    x = 3,144,769.58/2,739.59
  6. Step 6: Final answer
    x = 1,147.90

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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.