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Finding the Fourth Proportional to 854.67, 1,174.32 and 679.71

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Solution

The fourth proportional to 854.67, 1,174.32 and 679.71 is: 933.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.67 : 1,174.32 = 679.71 : x
  2. Step 2: Convert to fraction form
    854.67/1,174.32 = 679.71/x
  3. Step 3: Cross multiply
    854.67x = 1,174.32 × 679.71
  4. Step 4: Simplify right side
    854.67x = 798,197.05
  5. Step 5: Solve for x
    x = 798,197.05/854.67
  6. Step 6: Final answer
    x = 933.92

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.