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Finding the Fourth Proportional to 3,174.48, 4,379.56 and 1,915.67

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Solution

The fourth proportional to 3,174.48, 4,379.56 and 1,915.67 is: 2,642.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,174.48 : 4,379.56 = 1,915.67 : x
  2. Step 2: Convert to fraction form
    3,174.48/4,379.56 = 1,915.67/x
  3. Step 3: Cross multiply
    3,174.48x = 4,379.56 × 1,915.67
  4. Step 4: Simplify right side
    3,174.48x = 8,389,791.71
  5. Step 5: Solve for x
    x = 8,389,791.71/3,174.48
  6. Step 6: Final answer
    x = 2,642.89

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