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Finding the Fourth Proportional to 1,327.88, 1,992.18 and 403.42

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Solution

The fourth proportional to 1,327.88, 1,992.18 and 403.42 is: 605.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.88 : 1,992.18 = 403.42 : x
  2. Step 2: Convert to fraction form
    1,327.88/1,992.18 = 403.42/x
  3. Step 3: Cross multiply
    1,327.88x = 1,992.18 × 403.42
  4. Step 4: Simplify right side
    1,327.88x = 803,685.26
  5. Step 5: Solve for x
    x = 803,685.26/1,327.88
  6. Step 6: Final answer
    x = 605.24

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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.