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Finding the Fourth Proportional to 885.85, 1,327.56 and 520.15

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Solution

The fourth proportional to 885.85, 1,327.56 and 520.15 is: 779.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.85 : 1,327.56 = 520.15 : x
  2. Step 2: Convert to fraction form
    885.85/1,327.56 = 520.15/x
  3. Step 3: Cross multiply
    885.85x = 1,327.56 × 520.15
  4. Step 4: Simplify right side
    885.85x = 690,530.33
  5. Step 5: Solve for x
    x = 690,530.33/885.85
  6. Step 6: Final answer
    x = 779.51

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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.