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Finding the Fourth Proportional to 3,894.67, 5,372.89 and 2,402.65

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Solution

The fourth proportional to 3,894.67, 5,372.89 and 2,402.65 is: 3,314.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.67 : 5,372.89 = 2,402.65 : x
  2. Step 2: Convert to fraction form
    3,894.67/5,372.89 = 2,402.65/x
  3. Step 3: Cross multiply
    3,894.67x = 5,372.89 × 2,402.65
  4. Step 4: Simplify right side
    3,894.67x = 12,909,174.16
  5. Step 5: Solve for x
    x = 12,909,174.16/3,894.67
  6. Step 6: Final answer
    x = 3,314.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.