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Finding the Fourth Proportional to 854.55, 1,282.16 and 443.43

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Solution

The fourth proportional to 854.55, 1,282.16 and 443.43 is: 665.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.55 : 1,282.16 = 443.43 : x
  2. Step 2: Convert to fraction form
    854.55/1,282.16 = 443.43/x
  3. Step 3: Cross multiply
    854.55x = 1,282.16 × 443.43
  4. Step 4: Simplify right side
    854.55x = 568,545.99
  5. Step 5: Solve for x
    x = 568,545.99/854.55
  6. Step 6: Final answer
    x = 665.32

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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.