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Finding the Fourth Proportional to 1,469.87, 2,204.69 and 689.67

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Solution

The fourth proportional to 1,469.87, 2,204.69 and 689.67 is: 1,034.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,469.87 : 2,204.69 = 689.67 : x
  2. Step 2: Convert to fraction form
    1,469.87/2,204.69 = 689.67/x
  3. Step 3: Cross multiply
    1,469.87x = 2,204.69 × 689.67
  4. Step 4: Simplify right side
    1,469.87x = 1,520,508.55
  5. Step 5: Solve for x
    x = 1,520,508.55/1,469.87
  6. Step 6: Final answer
    x = 1,034.45

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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.