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Finding the Fourth Proportional to 854.86, 1,279.52 and 793.35

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Solution

The fourth proportional to 854.86, 1,279.52 and 793.35 is: 1,187.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.86 : 1,279.52 = 793.35 : x
  2. Step 2: Convert to fraction form
    854.86/1,279.52 = 793.35/x
  3. Step 3: Cross multiply
    854.86x = 1,279.52 × 793.35
  4. Step 4: Simplify right side
    854.86x = 1,015,107.19
  5. Step 5: Solve for x
    x = 1,015,107.19/854.86
  6. Step 6: Final answer
    x = 1,187.45

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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.