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Finding the Fourth Proportional to 885.73, 1,327.42 and 391.81

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Solution

The fourth proportional to 885.73, 1,327.42 and 391.81 is: 587.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.73 : 1,327.42 = 391.81 : x
  2. Step 2: Convert to fraction form
    885.73/1,327.42 = 391.81/x
  3. Step 3: Cross multiply
    885.73x = 1,327.42 × 391.81
  4. Step 4: Simplify right side
    885.73x = 520,096.43
  5. Step 5: Solve for x
    x = 520,096.43/885.73
  6. Step 6: Final answer
    x = 587.20

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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.