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Finding the Fourth Proportional to 1,199.69, 1,797.55 and 419.27

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Solution

The fourth proportional to 1,199.69, 1,797.55 and 419.27 is: 628.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.69 : 1,797.55 = 419.27 : x
  2. Step 2: Convert to fraction form
    1,199.69/1,797.55 = 419.27/x
  3. Step 3: Cross multiply
    1,199.69x = 1,797.55 × 419.27
  4. Step 4: Simplify right side
    1,199.69x = 753,656.69
  5. Step 5: Solve for x
    x = 753,656.69/1,199.69
  6. Step 6: Final answer
    x = 628.21

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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.