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Finding the Fourth Proportional to 2,736.40, 4,103.64 and 788.08

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Solution

The fourth proportional to 2,736.40, 4,103.64 and 788.08 is: 1,181.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,736.40 : 4,103.64 = 788.08 : x
  2. Step 2: Convert to fraction form
    2,736.40/4,103.64 = 788.08/x
  3. Step 3: Cross multiply
    2,736.40x = 4,103.64 × 788.08
  4. Step 4: Simplify right side
    2,736.40x = 3,233,996.61
  5. Step 5: Solve for x
    x = 3,233,996.61/2,736.40
  6. Step 6: Final answer
    x = 1,181.84

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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.