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Finding the Fourth Proportional to 2,147.67, 3,222 and 608.67

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Solution

The fourth proportional to 2,147.67, 3,222 and 608.67 is: 913.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,147.67 : 3,222 = 608.67 : x
  2. Step 2: Convert to fraction form
    2,147.67/3,222 = 608.67/x
  3. Step 3: Cross multiply
    2,147.67x = 3,222 × 608.67
  4. Step 4: Simplify right side
    2,147.67x = 1,961,134.74
  5. Step 5: Solve for x
    x = 1,961,134.74/2,147.67
  6. Step 6: Final answer
    x = 913.15

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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.