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Finding the Fourth Proportional to 891.23, 1,335.43 and 403.73

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Solution

The fourth proportional to 891.23, 1,335.43 and 403.73 is: 604.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.23 : 1,335.43 = 403.73 : x
  2. Step 2: Convert to fraction form
    891.23/1,335.43 = 403.73/x
  3. Step 3: Cross multiply
    891.23x = 1,335.43 × 403.73
  4. Step 4: Simplify right side
    891.23x = 539,144.46
  5. Step 5: Solve for x
    x = 539,144.46/891.23
  6. Step 6: Final answer
    x = 604.94

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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.