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Finding the Fourth Proportional to 1,097.05, 1,643.92 and 480.41

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Solution

The fourth proportional to 1,097.05, 1,643.92 and 480.41 is: 719.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.05 : 1,643.92 = 480.41 : x
  2. Step 2: Convert to fraction form
    1,097.05/1,643.92 = 480.41/x
  3. Step 3: Cross multiply
    1,097.05x = 1,643.92 × 480.41
  4. Step 4: Simplify right side
    1,097.05x = 789,753.21
  5. Step 5: Solve for x
    x = 789,753.21/1,097.05
  6. Step 6: Final answer
    x = 719.89

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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.