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Finding the Fourth Proportional to 3,654.44, 5,480.05 and 1,155

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Solution

The fourth proportional to 3,654.44, 5,480.05 and 1,155 is: 1,731.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,654.44 : 5,480.05 = 1,155 : x
  2. Step 2: Convert to fraction form
    3,654.44/5,480.05 = 1,155/x
  3. Step 3: Cross multiply
    3,654.44x = 5,480.05 × 1,155
  4. Step 4: Simplify right side
    3,654.44x = 6,329,457.75
  5. Step 5: Solve for x
    x = 6,329,457.75/3,654.44
  6. Step 6: Final answer
    x = 1,731.99

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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.